21200013201044 has 24 divisors (see below), whose sum is σ = 39064494084000. Its totient is φ = 10039067411040.

The previous prime is 21200013201041. The next prime is 21200013201061. The reversal of 21200013201044 is 44010231000212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200013201041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42026867 + ... + 42528314.

It is an arithmetic number, because the mean of its divisors is an integer number (1627687253500).

Almost surely, 2^{21200013201044} is an apocalyptic number.

It is an amenable number.

21200013201044 is a deficient number, since it is larger than the sum of its proper divisors (17864480882956).

21200013201044 is a wasteful number, since it uses less digits than its factorization.

21200013201044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84558503 (or 84558501 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21200013201044 its reverse (44010231000212), we get a palindrome (65210244201256).

The spelling of 21200013201044 in words is "twenty-one trillion, two hundred billion, thirteen million, two hundred one thousand, forty-four".