23121222131 has 8 divisors (see below), whose sum is σ = 26442476544. Its totient is φ = 19804523400.

The previous prime is 23121222101. The next prime is 23121222161. The reversal of 23121222131 is 13122212132.

It is an interprime number because it is at equal distance from previous prime (23121222101) and next prime (23121222161).

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 23121222131 - 2⁶ = 23121222067 is a prime.

It is a super-2 number, since 2×23121222131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23121222101) 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, 1128035 + ... + 1148348.

It is an arithmetic number, because the mean of its divisors is an integer number (3305309568).

Almost surely, 2^23121222131 is an apocalyptic number.

23121222131 is a deficient number, since it is larger than the sum of its proper divisors (3321254413).

23121222131 is a wasteful number, since it uses less digits than its factorization.

23121222131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2277841.

The product of its digits is 288, while the sum is 20.

Adding to 23121222131 its reverse (13122212132), we get a palindrome (36243434263).

Subtracting from 23121222131 its reverse (13122212132), we obtain a palindrome (9999009999).

The spelling of 23121222131 in words is "twenty-three billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred thirty-one".