23121011220031 has 4 divisors (see below), whose sum is σ = 23121915010272. Its totient is φ = 23120107429792.

The previous prime is 23121011220029. The next prime is 23121011220079. The reversal of 23121011220031 is 13002211012132.

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

It is a cyclic number.

It is not a de Polignac number, because 23121011220031 - 2¹ = 23121011220029 is a prime.

It is a super-2 number, since 2×23121011220031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23121011219990 and 23121011220008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121011220091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451856746 + ... + 451907911.

It is an arithmetic number, because the mean of its divisors is an integer number (5780478752568).

Almost surely, 2^{23121011220031} is an apocalyptic number.

23121011220031 is a deficient number, since it is larger than the sum of its proper divisors (903790241).

23121011220031 is an equidigital number, since it uses as much as digits as its factorization.

23121011220031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903790240.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 23121011220031 its reverse (13002211012132), we get a palindrome (36123222232163).

The spelling of 23121011220031 in words is "twenty-three trillion, one hundred twenty-one billion, eleven million, two hundred twenty thousand, thirty-one".