22131330491 has 2 divisors, whose sum is σ = 22131330492. Its totient is φ = 22131330490.

The previous prime is 22131330421. The next prime is 22131330499. The reversal of 22131330491 is 19403313122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22131330491 - 2³⁰ = 21057588667 is a prime.

It is not a weakly prime, because it can be changed into another prime (22131330499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065665245 + 11065665246.

It is an arithmetic number, because the mean of its divisors is an integer number (11065665246).

Almost surely, 2^22131330491 is an apocalyptic number.

22131330491 is a deficient number, since it is larger than the sum of its proper divisors (1).

22131330491 is an equidigital number, since it uses as much as digits as its factorization.

22131330491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 22131330491 in words is "twenty-two billion, one hundred thirty-one million, three hundred thirty thousand, four hundred ninety-one".