21310312331011 has 16 divisors (see below), whose sum is σ = 23260601115648. Its totient is φ = 19362189445600.

The previous prime is 21310312330963. The next prime is 21310312331039. The reversal of 21310312331011 is 11013321301312.

It is a cyclic number.

It is not a de Polignac number, because 21310312331011 - 2⁷ = 21310312330883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21310312331041) 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, 601577646 + ... + 601613068.

It is an arithmetic number, because the mean of its divisors is an integer number (1453787569728).

Almost surely, 2^{21310312331011} is an apocalyptic number.

21310312331011 is a deficient number, since it is larger than the sum of its proper divisors (1950288784637).

21310312331011 is a wasteful number, since it uses less digits than its factorization.

21310312331011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64442.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 21310312331011 its reverse (11013321301312), we get a palindrome (32323633632323).

The spelling of 21310312331011 in words is "twenty-one trillion, three hundred ten billion, three hundred twelve million, three hundred thirty-one thousand, eleven".