121215255193 has 16 divisors (see below), whose sum is σ = 128999295360. Its totient is φ = 113505235200.

The previous prime is 121215255169. The next prime is 121215255229. The reversal of 121215255193 is 391552512121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121215255193 is a prime.

It is a super-2 number, since 2×121215255193² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121215255143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2839078 + ... + 2881456.

It is an arithmetic number, because the mean of its divisors is an integer number (8062455960).

Almost surely, 2^121215255193 is an apocalyptic number.

It is an amenable number.

121215255193 is a deficient number, since it is larger than the sum of its proper divisors (7784040167).

121215255193 is a wasteful number, since it uses less digits than its factorization.

121215255193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43248.

The product of its digits is 27000, while the sum is 37.

The spelling of 121215255193 in words is "one hundred twenty-one billion, two hundred fifteen million, two hundred fifty-five thousand, one hundred ninety-three".