21010412044 has 6 divisors (see below), whose sum is σ = 36768221084. Its totient is φ = 10505206020.

The previous prime is 21010412041. The next prime is 21010412069. The reversal of 21010412044 is 44021401012.

It is not an unprimeable number, because it can be changed into a prime (21010412041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2626301502 + ... + 2626301509.

Almost surely, 2^21010412044 is an apocalyptic number.

It is an amenable number.

21010412044 is a deficient number, since it is larger than the sum of its proper divisors (15757809040).

21010412044 is a wasteful number, since it uses less digits than its factorization.

21010412044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252603015 (or 5252603013 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21010412044 its reverse (44021401012), we get a palindrome (65031813056).

The spelling of 21010412044 in words is "twenty-one billion, ten million, four hundred twelve thousand, forty-four".