12122277545591 has 2 divisors, whose sum is σ = 12122277545592. Its totient is φ = 12122277545590.

The previous prime is 12122277545551. The next prime is 12122277545593. The reversal of 12122277545591 is 19554577222121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12122277545591 - 2³⁰ = 12121203803767 is a prime.

It is a super-2 number, since 2×12122277545591² (a number of 27 digits) contains 22 as substring.

Together with 12122277545593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12122277545593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061138772795 + 6061138772796.

It is an arithmetic number, because the mean of its divisors is an integer number (6061138772796).

Almost surely, 2^{12122277545591} is an apocalyptic number.

12122277545591 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122277545591 is an equidigital number, since it uses as much as digits as its factorization.

12122277545591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528000, while the sum is 53.

The spelling of 12122277545591 in words is "twelve trillion, one hundred twenty-two billion, two hundred seventy-seven million, five hundred forty-five thousand, five hundred ninety-one".