21020444014331 has 32 divisors (see below), whose sum is σ = 22804168569600. Its totient is φ = 19365237295488.

The previous prime is 21020444014261. The next prime is 21020444014387. The reversal of 21020444014331 is 13341044402012.

It is a de Polignac number, because none of the positive numbers 2^k-21020444014331 is a prime.

It is a super-2 number, since 2×21020444014331² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21020444014294 and 21020444014303.

It is not an unprimeable number, because it can be changed into a prime (21020444014831) 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, 66793715 + ... + 67107683.

It is an arithmetic number, because the mean of its divisors is an integer number (712630267800).

Almost surely, 2^{21020444014331} is an apocalyptic number.

21020444014331 is a deficient number, since it is larger than the sum of its proper divisors (1783724555269).

21020444014331 is an equidigital number, since it uses as much as digits as its factorization.

21020444014331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314296 (or 314258 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21020444014331 its reverse (13341044402012), we get a palindrome (34361488416343).

The spelling of 21020444014331 in words is "twenty-one trillion, twenty billion, four hundred forty-four million, fourteen thousand, three hundred thirty-one".