23131130221 has 16 divisors (see below), whose sum is σ = 24014914560. Its totient is φ = 22256242560.

The previous prime is 23131130219. The next prime is 23131130227. The reversal of 23131130221 is 12203113132.

It is a cyclic number.

It is not a de Polignac number, because 23131130221 - 2¹ = 23131130219 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 (23131130227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5985936 + ... + 5989798.

It is an arithmetic number, because the mean of its divisors is an integer number (1500932160).

Almost surely, 2^23131130221 is an apocalyptic number.

It is an amenable number.

23131130221 is a deficient number, since it is larger than the sum of its proper divisors (883784339).

23131130221 is a wasteful number, since it uses less digits than its factorization.

23131130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4956.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 23131130221 its reverse (12203113132), we get a palindrome (35334243353).

The spelling of 23131130221 in words is "twenty-three billion, one hundred thirty-one million, one hundred thirty thousand, two hundred twenty-one".