121013255553 has 8 divisors (see below), whose sum is σ = 162252410400. Its totient is φ = 80224802208.

The previous prime is 121013255537. The next prime is 121013255557. The reversal of 121013255553 is 355552310121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121013255553 - 2⁴ = 121013255537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121013255557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112674748 + ... + 112675821.

It is an arithmetic number, because the mean of its divisors is an integer number (20281551300).

Almost surely, 2^121013255553 is an apocalyptic number.

It is an amenable number.

121013255553 is a deficient number, since it is larger than the sum of its proper divisors (41239154847).

121013255553 is a wasteful number, since it uses less digits than its factorization.

121013255553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225350751.

The product of its (nonzero) digits is 22500, while the sum is 33.

Adding to 121013255553 its reverse (355552310121), we get a palindrome (476565565674).

The spelling of 121013255553 in words is "one hundred twenty-one billion, thirteen million, two hundred fifty-five thousand, five hundred fifty-three".