10323131221 has 16 divisors (see below), whose sum is σ = 11774642544. Its totient is φ = 8965868544.

The previous prime is 10323131173. The next prime is 10323131227. The reversal of 10323131221 is 12213132301.

It can be written as a sum of positive squares in 8 ways, for example, as 950180625 + 9372950596 = 30825^2 + 96814^2 .

It is not a de Polignac number, because 10323131221 - 2⁹ = 10323130709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10323131227) 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, 1333855 + ... + 1341571.

It is an arithmetic number, because the mean of its divisors is an integer number (735915159).

Almost surely, 2^10323131221 is an apocalyptic number.

It is an amenable number.

10323131221 is a deficient number, since it is larger than the sum of its proper divisors (1451511323).

10323131221 is a wasteful number, since it uses less digits than its factorization.

10323131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13800.

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

Adding to 10323131221 its reverse (12213132301), we get a palindrome (22536263522).

The spelling of 10323131221 in words is "ten billion, three hundred twenty-three million, one hundred thirty-one thousand, two hundred twenty-one".