21131012202223 has 32 divisors (see below), whose sum is σ = 26399617413120. Its totient is φ = 16431693384960.

The previous prime is 21131012202217. The next prime is 21131012202227. The reversal of 21131012202223 is 32220221013112.

It is not a de Polignac number, because 21131012202223 - 2²¹ = 21131010105071 is a prime.

It is a super-2 number, since 2×21131012202223² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21131012202194 and 21131012202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131012202227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 497612290 + ... + 497654752.

It is an arithmetic number, because the mean of its divisors is an integer number (824988044160).

Almost surely, 2^{21131012202223} is an apocalyptic number.

21131012202223 is a deficient number, since it is larger than the sum of its proper divisors (5268605210897).

21131012202223 is a wasteful number, since it uses less digits than its factorization.

21131012202223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55687.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21131012202223 its reverse (32220221013112), we get a palindrome (53351233215335).

The spelling of 21131012202223 in words is "twenty-one trillion, one hundred thirty-one billion, twelve million, two hundred two thousand, two hundred twenty-three".