21550550334110 has 64 divisors (see below), whose sum is σ = 44921990568960. Its totient is φ = 7290859994880.

The previous prime is 21550550334083. The next prime is 21550550334151. The reversal of 21550550334110 is 1143305505512.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 463634 + ... + 6581493.

It is an arithmetic number, because the mean of its divisors is an integer number (701906102640).

Almost surely, 2^{21550550334110} is an apocalyptic number.

21550550334110 is an abundant number, since it is smaller than the sum of its proper divisors (23371440234850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21550550334110 is a wasteful number, since it uses less digits than its factorization.

21550550334110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7045721.

The product of its (nonzero) digits is 45000, while the sum is 35.

Adding to 21550550334110 its reverse (1143305505512), we get a palindrome (22693855839622).

The spelling of 21550550334110 in words is "twenty-one trillion, five hundred fifty billion, five hundred fifty million, three hundred thirty-four thousand, one hundred ten".