21000211053 has 32 divisors (see below), whose sum is σ = 29287329792. Its totient is φ = 13369017600.

The previous prime is 21000211051. The next prime is 21000211069. The reversal of 21000211053 is 35011200012.

It is not a de Polignac number, because 21000211053 - 2¹ = 21000211051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000211051) 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, 11816901 + ... + 11818677.

It is an arithmetic number, because the mean of its divisors is an integer number (915229056).

Almost surely, 2^21000211053 is an apocalyptic number.

It is an amenable number.

21000211053 is a deficient number, since it is larger than the sum of its proper divisors (8287118739).

21000211053 is a wasteful number, since it uses less digits than its factorization.

21000211053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425.

The product of its (nonzero) digits is 60, while the sum is 15.

Adding to 21000211053 its reverse (35011200012), we get a palindrome (56011411065).

The spelling of 21000211053 in words is "twenty-one billion, two hundred eleven thousand, fifty-three".