21310003311 has 16 divisors (see below), whose sum is σ = 28638411648. Its totient is φ = 14094194400.

The previous prime is 21310003277. The next prime is 21310003327. The reversal of 21310003311 is 11330001312.

It is not a de Polignac number, because 21310003311 - 2⁹ = 21310002799 is a prime.

It is a super-2 number, since 2×21310003311² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310003361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2096301 + ... + 2106441.

It is an arithmetic number, because the mean of its divisors is an integer number (1789900728).

Almost surely, 2^21310003311 is an apocalyptic number.

21310003311 is a deficient number, since it is larger than the sum of its proper divisors (7328408337).

21310003311 is a wasteful number, since it uses less digits than its factorization.

21310003311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15622.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21310003311 its reverse (11330001312), we get a palindrome (32640004623).

The spelling of 21310003311 in words is "twenty-one billion, three hundred ten million, three thousand, three hundred eleven".