121253221054215 has 32 divisors (see below), whose sum is σ = 217134721920960. Its totient is φ = 64196352548352.

The previous prime is 121253221054193. The next prime is 121253221054243. The reversal of 121253221054215 is 512450122352121.

121253221054215 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 5 + 3 + 221 + 0 + 5 + 421 + 5 = 666.

It is not a de Polignac number, because 121253221054215 - 2⁹ = 121253221053703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121253221054215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3277981534 + ... + 3278018523.

It is an arithmetic number, because the mean of its divisors is an integer number (6785460060030).

Almost surely, 2^{121253221054215} is an apocalyptic number.

121253221054215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121253221054215 is a deficient number, since it is larger than the sum of its proper divisors (95881500866745).

121253221054215 is a wasteful number, since it uses less digits than its factorization.

121253221054215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6556000208 (or 6556000202 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The spelling of 121253221054215 in words is "one hundred twenty-one trillion, two hundred fifty-three billion, two hundred twenty-one million, fifty-four thousand, two hundred fifteen".