55057211121 has 32 divisors (see below), whose sum is σ = 82272198528. Its totient is φ = 32456471040.

The previous prime is 55057211093. The next prime is 55057211149. The reversal of 55057211121 is 12111275055.

It is an interprime number because it is at equal distance from previous prime (55057211093) and next prime (55057211149).

It is not a de Polignac number, because 55057211121 - 2⁹ = 55057210609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55057211171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7587331 + ... + 7594583.

It is an arithmetic number, because the mean of its divisors is an integer number (2571006204).

Almost surely, 2^55057211121 is an apocalyptic number.

It is an amenable number.

55057211121 is a deficient number, since it is larger than the sum of its proper divisors (27214987407).

55057211121 is a wasteful number, since it uses less digits than its factorization.

55057211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13521.

The product of its (nonzero) digits is 3500, while the sum is 30.

Adding to 55057211121 its reverse (12111275055), we get a palindrome (67168486176).

The spelling of 55057211121 in words is "fifty-five billion, fifty-seven million, two hundred eleven thousand, one hundred twenty-one".