23121131309 has 8 divisors (see below), whose sum is σ = 23432423040. Its totient is φ = 22811509296.

The previous prime is 23121131251. The next prime is 23121131321. The reversal of 23121131309 is 90313112132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23121131309 - 2⁸ = 23121131053 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 (23121131329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389537 + ... + 444950.

It is an arithmetic number, because the mean of its divisors is an integer number (2929052880).

Almost surely, 2^23121131309 is an apocalyptic number.

It is an amenable number.

23121131309 is a deficient number, since it is larger than the sum of its proper divisors (311291731).

23121131309 is a wasteful number, since it uses less digits than its factorization.

23121131309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834859.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 23121131309 in words is "twenty-three billion, one hundred twenty-one million, one hundred thirty-one thousand, three hundred nine".