55124112121 has 32 divisors (see below), whose sum is σ = 65401539840. Its totient is φ = 45971380224.

The previous prime is 55124112101. The next prime is 55124112133. The reversal of 55124112121 is 12121142155.

It is a cyclic number.

It is not a de Polignac number, because 55124112121 - 2⁵ = 55124112089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55124112101) 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, 1900101 + ... + 1928893.

It is an arithmetic number, because the mean of its divisors is an integer number (2043798120).

Almost surely, 2^55124112121 is an apocalyptic number.

It is an amenable number.

55124112121 is a deficient number, since it is larger than the sum of its proper divisors (10277427719).

55124112121 is a wasteful number, since it uses less digits than its factorization.

55124112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29185.

The product of its digits is 800, while the sum is 25.

Adding to 55124112121 its reverse (12121142155), we get a palindrome (67245254276).

The spelling of 55124112121 in words is "fifty-five billion, one hundred twenty-four million, one hundred twelve thousand, one hundred twenty-one".