121021255450456 has 32 divisors (see below), whose sum is σ = 232469205242400. Its totient is φ = 59029719356160.

The previous prime is 121021255450339. The next prime is 121021255450477. The reversal of 121021255450456 is 654054552120121.

It is a super-2 number, since 2×121021255450456² (a number of 29 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, 11898435 + ... + 19586098.

It is an arithmetic number, because the mean of its divisors is an integer number (7264662663825).

Almost surely, 2^{121021255450456} is an apocalyptic number.

It is an amenable number.

121021255450456 is a deficient number, since it is larger than the sum of its proper divisors (111447949791944).

121021255450456 is a wasteful number, since it uses less digits than its factorization.

121021255450456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31496299 (or 31496295 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 43.

The spelling of 121021255450456 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred fifty-five million, four hundred fifty thousand, four hundred fifty-six".