121515338370 has 16 divisors (see below), whose sum is σ = 291636812160. Its totient is φ = 32404090224.

The previous prime is 121515338333. The next prime is 121515338423. The reversal of 121515338370 is 73833515121.

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, 2025255610 + ... + 2025255669.

It is an arithmetic number, because the mean of its divisors is an integer number (18227300760).

Almost surely, 2^121515338370 is an apocalyptic number.

121515338370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121515338370 is an abundant number, since it is smaller than the sum of its proper divisors (170121473790).

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

121515338370 is a wasteful number, since it uses less digits than its factorization.

121515338370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4050511289.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 121515338370 in words is "one hundred twenty-one billion, five hundred fifteen million, three hundred thirty-eight thousand, three hundred seventy".