21310003011 has 32 divisors (see below), whose sum is σ = 31769127936. Its totient is φ = 12593504000.

The previous prime is 21310002991. The next prime is 21310003019. The reversal of 21310003011 is 11030001312.

It is not a de Polignac number, because 21310003011 - 2⁶ = 21310002947 is a prime.

It is a super-2 number, since 2×21310003011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21310003019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3957541 + ... + 3962921.

It is an arithmetic number, because the mean of its divisors is an integer number (992785248).

Almost surely, 2^21310003011 is an apocalyptic number.

21310003011 is a deficient number, since it is larger than the sum of its proper divisors (10459124925).

21310003011 is a wasteful number, since it uses less digits than its factorization.

21310003011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8363.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 21310003011 its reverse (11030001312), we get a palindrome (32340004323).

The spelling of 21310003011 in words is "twenty-one billion, three hundred ten million, three thousand, eleven".