23031111133221 has 4 divisors (see below), whose sum is σ = 30708148177632. Its totient is φ = 15354074088812.

The previous prime is 23031111133213. The next prime is 23031111133229. The reversal of 23031111133221 is 12233111113032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (23031111133213) and next prime (23031111133229).

It is a cyclic number.

It is not a de Polignac number, because 23031111133221 - 2³ = 23031111133213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23031111133191 and 23031111133200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23031111133229) 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, 3838518522201 + ... + 3838518522206.

It is an arithmetic number, because the mean of its divisors is an integer number (7677037044408).

Almost surely, 2^{23031111133221} is an apocalyptic number.

It is an amenable number.

23031111133221 is a deficient number, since it is larger than the sum of its proper divisors (7677037044411).

23031111133221 is an equidigital number, since it uses as much as digits as its factorization.

23031111133221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7677037044410.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 23031111133221 its reverse (12233111113032), we get a palindrome (35264222246253).

The spelling of 23031111133221 in words is "twenty-three trillion, thirty-one billion, one hundred eleven million, one hundred thirty-three thousand, two hundred twenty-one".