121097158656 has 152 divisors (see below), whose sum is σ = 330527301984. Its totient is φ = 39415971840.

The previous prime is 121097158649. The next prime is 121097158657. The reversal of 121097158656 is 656851790121.

It is a junction number, because it is equal to n+sod(n) for n = 121097158599 and 121097158608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121097158657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33814786 + ... + 33818366.

Almost surely, 2^121097158656 is an apocalyptic number.

121097158656 is a gapful number since it is divisible by the number (16) 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 121097158656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165263650992).

121097158656 is an abundant number, since it is smaller than the sum of its proper divisors (209430143328).

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

121097158656 is an frugal number, since it uses more digits than its factorization.

121097158656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663 (or 3629 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 51.

The spelling of 121097158656 in words is "one hundred twenty-one billion, ninety-seven million, one hundred fifty-eight thousand, six hundred fifty-six".