55102245121 has 16 divisors (see below), whose sum is σ = 68835529728. Its totient is φ = 42851422800.

The previous prime is 55102245103. The next prime is 55102245137. The reversal of 55102245121 is 12154220155.

It is a cyclic number.

It is not a de Polignac number, because 55102245121 - 2⁹ = 55102244609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55102245121.

It is not an unprimeable number, because it can be changed into a prime (55102245721) 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, 672615 + ... + 750076.

It is an arithmetic number, because the mean of its divisors is an integer number (4302220608).

Almost surely, 2^55102245121 is an apocalyptic number.

It is an amenable number.

55102245121 is a deficient number, since it is larger than the sum of its proper divisors (13733284607).

55102245121 is a wasteful number, since it uses less digits than its factorization.

55102245121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423212.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 55102245121 its reverse (12154220155), we get a palindrome (67256465276).

The spelling of 55102245121 in words is "fifty-five billion, one hundred two million, two hundred forty-five thousand, one hundred twenty-one".