22231123081 has 2 divisors, whose sum is σ = 22231123082. Its totient is φ = 22231123080.

The previous prime is 22231123073. The next prime is 22231123127. The reversal of 22231123081 is 18032113222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21772478025 + 458645056 = 147555^2 + 21416^2 .

It is a cyclic number.

It is not a de Polignac number, because 22231123081 - 2³ = 22231123073 is a prime.

It is a super-2 number, since 2×22231123081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22231123381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11115561540 + 11115561541.

It is an arithmetic number, because the mean of its divisors is an integer number (11115561541).

Almost surely, 2^22231123081 is an apocalyptic number.

It is an amenable number.

22231123081 is a deficient number, since it is larger than the sum of its proper divisors (1).

22231123081 is an equidigital number, since it uses as much as digits as its factorization.

22231123081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 22231123081 in words is "twenty-two billion, two hundred thirty-one million, one hundred twenty-three thousand, eighty-one".