121214256145455 has 64 divisors (see below), whose sum is σ = 213674199837696. Its totient is φ = 58187182080000.

The previous prime is 121214256145441. The next prime is 121214256145501. The reversal of 121214256145455 is 554541652412121.

It is not a de Polignac number, because 121214256145455 - 2⁴ = 121214256145439 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 945024687 + ... + 945152943.

It is an arithmetic number, because the mean of its divisors is an integer number (3338659372464).

Almost surely, 2^{121214256145455} is an apocalyptic number.

121214256145455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121214256145455 is a deficient number, since it is larger than the sum of its proper divisors (92459943692241).

121214256145455 is a wasteful number, since it uses less digits than its factorization.

121214256145455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185088.

The product of its digits is 1920000, while the sum is 48.

The spelling of 121214256145455 in words is "one hundred twenty-one trillion, two hundred fourteen billion, two hundred fifty-six million, one hundred forty-five thousand, four hundred fifty-five".