121152623405220 has 288 divisors, whose sum is σ = 405970122894336. Its totient is φ = 29001053548800.

The previous prime is 121152623405171. The next prime is 121152623405243. The reversal of 121152623405220 is 22504326251121.

121152623405220 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 5 + 2 + 6 + 23 + 405 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 64109665 + ... + 65972375.

It is an arithmetic number, because the mean of its divisors is an integer number (1409618482272).

Almost surely, 2^{121152623405220} is an apocalyptic number.

121152623405220 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 121152623405220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202985061447168).

121152623405220 is an abundant number, since it is smaller than the sum of its proper divisors (284817499489116).

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

121152623405220 is a wasteful number, since it uses less digits than its factorization.

121152623405220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863151 (or 1863146 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 121152623405220 its reverse (22504326251121), we get a palindrome (143656949656341).

The spelling of 121152623405220 in words is "one hundred twenty-one trillion, one hundred fifty-two billion, six hundred twenty-three million, four hundred five thousand, two hundred twenty".