121255151013 has 16 divisors (see below), whose sum is σ = 181855008000. Its totient is φ = 80836765884.

The previous prime is 121255150993. The next prime is 121255151027. The reversal of 121255151013 is 310151552121.

It is a happy number.

121255151013 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 551 + 5 + 101 + 3 = 666.

It is not a de Polignac number, because 121255151013 - 2⁵ = 121255150981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121255151113) 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, 27719613 + ... + 27723986.

It is an arithmetic number, because the mean of its divisors is an integer number (11365938000).

Almost surely, 2^121255151013 is an apocalyptic number.

It is an amenable number.

121255151013 is a deficient number, since it is larger than the sum of its proper divisors (60599856987).

121255151013 is an frugal number, since it uses more digits than its factorization.

121255151013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55443620 (or 55443602 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

The spelling of 121255151013 in words is "one hundred twenty-one billion, two hundred fifty-five million, one hundred fifty-one thousand, thirteen".