121216152258116 has 6 divisors (see below), whose sum is σ = 212128266451710. Its totient is φ = 60608076129056.

The previous prime is 121216152258083. The next prime is 121216152258127. The reversal of 121216152258116 is 611852251612121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 88712926912516 + 32503225345600 = 9418754^2 + 5701160^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15152019032261 + ... + 15152019032268.

It is an arithmetic number, because the mean of its divisors is an integer number (35354711075285).

Almost surely, 2^{121216152258116} is an apocalyptic number.

It is an amenable number.

121216152258116 is a deficient number, since it is larger than the sum of its proper divisors (90912114193594).

121216152258116 is a wasteful number, since it uses less digits than its factorization.

121216152258116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30304038064533 (or 30304038064531 counting only the distinct ones).

The product of its digits is 115200, while the sum is 44.

The spelling of 121216152258116 in words is "one hundred twenty-one trillion, two hundred sixteen billion, one hundred fifty-two million, two hundred fifty-eight thousand, one hundred sixteen".