23131030121 has 4 divisors (see below), whose sum is σ = 23250880212. Its totient is φ = 23011180032.

The previous prime is 23131030099. The next prime is 23131030133. The reversal of 23131030121 is 12103013132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13844816896 + 9286213225 = 117664^2 + 96365^2 .

It is a cyclic number.

It is not a de Polignac number, because 23131030121 - 2²² = 23126835817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23131030121.

It is not an unprimeable number, because it can be changed into a prime (23131030921) 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 3 ways as a sum of consecutive naturals, for example, 59924756 + ... + 59925141.

It is an arithmetic number, because the mean of its divisors is an integer number (5812720053).

Almost surely, 2^23131030121 is an apocalyptic number.

It is an amenable number.

23131030121 is a deficient number, since it is larger than the sum of its proper divisors (119850091).

23131030121 is a wasteful number, since it uses less digits than its factorization.

23131030121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119850090.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 23131030121 its reverse (12103013132), we get a palindrome (35234043253).

The spelling of 23131030121 in words is "twenty-three billion, one hundred thirty-one million, thirty thousand, one hundred twenty-one".