55021103553321 has 32 divisors (see below), whose sum is σ = 81601091193600. Its totient is φ = 36640997930880.

The previous prime is 55021103553289. The next prime is 55021103553389. The reversal of 55021103553321 is 12335530112055.

55021103553321 is a `hidden beast` number, since 5 + 5 + 0 + 2 + 110 + 3 + 5 + 533 + 2 + 1 = 666.

It is not a de Polignac number, because 55021103553321 - 2⁵ = 55021103553289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55021103551321) 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, 113598955 + ... + 114082271.

It is an arithmetic number, because the mean of its divisors is an integer number (2550034099800).

Almost surely, 2^{55021103553321} is an apocalyptic number.

It is an amenable number.

55021103553321 is a deficient number, since it is larger than the sum of its proper divisors (26579987640279).

55021103553321 is a wasteful number, since it uses less digits than its factorization.

55021103553321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487886 (or 487880 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

Adding to 55021103553321 its reverse (12335530112055), we get a palindrome (67356633665376).

The spelling of 55021103553321 in words is "fifty-five trillion, twenty-one billion, one hundred three million, five hundred fifty-three thousand, three hundred twenty-one".