23213521121081 has 2 divisors, whose sum is σ = 23213521121082. Its totient is φ = 23213521121080.

The previous prime is 23213521121033. The next prime is 23213521121111. The reversal of 23213521121081 is 18012112531232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20204305806400 + 3009215314681 = 4494920^2 + 1734709^2 .

It is a cyclic number.

It is not a de Polignac number, because 23213521121081 - 2⁶ = 23213521121017 is a prime.

It is a super-2 number, since 2×23213521121081² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23213521121381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11606760560540 + 11606760560541.

It is an arithmetic number, because the mean of its divisors is an integer number (11606760560541).

Almost surely, 2^{23213521121081} is an apocalyptic number.

It is an amenable number.

23213521121081 is a deficient number, since it is larger than the sum of its proper divisors (1).

23213521121081 is an equidigital number, since it uses as much as digits as its factorization.

23213521121081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 32.

The spelling of 23213521121081 in words is "twenty-three trillion, two hundred thirteen billion, five hundred twenty-one million, one hundred twenty-one thousand, eighty-one".