23131120230421 has 32 divisors (see below), whose sum is σ = 27245083928832. Its totient is φ = 19223318338560.

The previous prime is 23131120230373. The next prime is 23131120230433. The reversal of 23131120230421 is 12403202113132.

It is not a de Polignac number, because 23131120230421 - 2¹¹ = 23131120228373 is a prime.

It is a super-2 number, since 2×23131120230421² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131120233421) 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, 349585581 + ... + 349651741.

It is an arithmetic number, because the mean of its divisors is an integer number (851408872776).

Almost surely, 2^{23131120230421} is an apocalyptic number.

It is an amenable number.

23131120230421 is a deficient number, since it is larger than the sum of its proper divisors (4113963698411).

23131120230421 is a wasteful number, since it uses less digits than its factorization.

23131120230421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70909.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 23131120230421 its reverse (12403202113132), we get a palindrome (35534322343553).

The spelling of 23131120230421 in words is "twenty-three trillion, one hundred thirty-one billion, one hundred twenty million, two hundred thirty thousand, four hundred twenty-one".