21310001026 has 16 divisors (see below), whose sum is σ = 32233904640. Its totient is φ = 10565719120.

The previous prime is 21310001021. The next prime is 21310001033. The reversal of 21310001026 is 62010001312.

It is a super-2 number, since 2×21310001026² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21310001021) 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, 33105 + ... + 209083.

It is an arithmetic number, because the mean of its divisors is an integer number (2014619040).

Almost surely, 2^21310001026 is an apocalyptic number.

21310001026 is a deficient number, since it is larger than the sum of its proper divisors (10923903614).

21310001026 is a wasteful number, since it uses less digits than its factorization.

21310001026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176489.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21310001026 its reverse (62010001312), we get a palindrome (83320002338).

The spelling of 21310001026 in words is "twenty-one billion, three hundred ten million, one thousand, twenty-six".