Search a number
-
+
121020121210120 = 235112337476876659
BaseRepresentation
bin11011100001000100110001…
…010101011101110100001000
3120212111102002022210211200221
4123201010301111131310020
5111330243202012210440
61105215513130435424
734330262264331316
oct3341046125356410
9525442068724627
10121020121210120
1135619388487080
12116a6615892b74
13526b1c122bab2
1421c55959110b6
15ded0275cbd4a
hex6e113155dd08

121020121210120 has 256 divisors, whose sum is σ = 325115281612800. Its totient is φ = 40084864680960.

The previous prime is 121020121210111. The next prime is 121020121210159. The reversal of 121020121210120 is 21012121020121.

It is a junction number, because it is equal to n+sod(n) for n = 121020121210094 and 121020121210103.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14160351 + ... + 21037009.

It is an arithmetic number, because the mean of its divisors is an integer number (1269981568800).

Almost surely, 2121020121210120 is an apocalyptic number.

121020121210120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121020121210120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162557640806400).

121020121210120 is an abundant number, since it is smaller than the sum of its proper divisors (204095160402680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121020121210120 is a wasteful number, since it uses less digits than its factorization.

121020121210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6876788 (or 6876784 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121020121210120 its reverse (21012121020121), we get a palindrome (142032242230241).

The spelling of 121020121210120 in words is "one hundred twenty-one trillion, twenty billion, one hundred twenty-one million, two hundred ten thousand, one hundred twenty".