121655522356 has 24 divisors (see below), whose sum is σ = 213789814560. Its totient is φ = 60572820000.

The previous prime is 121655522347. The next prime is 121655522369. The reversal of 121655522356 is 653225556121.

It is a super-2 number, since 2×121655522356² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6485511 + ... + 6504241.

It is an arithmetic number, because the mean of its divisors is an integer number (8907908940).

Almost surely, 2^121655522356 is an apocalyptic number.

It is an amenable number.

121655522356 is a deficient number, since it is larger than the sum of its proper divisors (92134292204).

121655522356 is a wasteful number, since it uses less digits than its factorization.

121655522356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25455 (or 25453 counting only the distinct ones).

The product of its digits is 540000, while the sum is 43.

The spelling of 121655522356 in words is "one hundred twenty-one billion, six hundred fifty-five million, five hundred twenty-two thousand, three hundred fifty-six".