121121000021120 has 256 divisors, whose sum is σ = 319086006670080. Its totient is φ = 43597084016640.

The previous prime is 121121000021083. The next prime is 121121000021129. The reversal of 121121000021120 is 21120000121121.

It is a super-2 number, since 2×121121000021120² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121121000021095 and 121121000021104.

It is not an unprimeable number, because it can be changed into a prime (121121000021129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1691669162 + ... + 1691740758.

It is an arithmetic number, because the mean of its divisors is an integer number (1246429713555).

Almost surely, 2^{121121000021120} is an apocalyptic number.

121121000021120 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 121121000021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159543003335040).

121121000021120 is an abundant number, since it is smaller than the sum of its proper divisors (197965006648960).

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

121121000021120 is a wasteful number, since it uses less digits than its factorization.

121121000021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74063 (or 74051 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121121000021120 its reverse (21120000121121), we get a palindrome (142241000142241).

The spelling of 121121000021120 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, twenty-one thousand, one hundred twenty".