21131013103023 has 16 divisors (see below), whose sum is σ = 28596496557440. Its totient is φ = 13876454899296.

The previous prime is 21131013103021. The next prime is 21131013103061. The reversal of 21131013103023 is 32030131013112.

It is a happy number.

It is not a de Polignac number, because 21131013103023 - 2¹ = 21131013103021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131013103021) 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, 2091036 + ... + 6828942.

It is an arithmetic number, because the mean of its divisors is an integer number (1787281034840).

Almost surely, 2^{21131013103023} is an apocalyptic number.

21131013103023 is a deficient number, since it is larger than the sum of its proper divisors (7465483454417).

21131013103023 is a wasteful number, since it uses less digits than its factorization.

21131013103023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4760166.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21131013103023 its reverse (32030131013112), we get a palindrome (53161144116135).

The spelling of 21131013103023 in words is "twenty-one trillion, one hundred thirty-one billion, thirteen million, one hundred three thousand, twenty-three".