122199421427 has 2 divisors, whose sum is σ = 122199421428. Its totient is φ = 122199421426.

The previous prime is 122199421373. The next prime is 122199421447. The reversal of 122199421427 is 724124991221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122199421427 - 2⁶ = 122199421363 is a prime.

It is not a weakly prime, because it can be changed into another prime (122199421447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61099710713 + 61099710714.

It is an arithmetic number, because the mean of its divisors is an integer number (61099710714).

Almost surely, 2^122199421427 is an apocalyptic number.

122199421427 is a deficient number, since it is larger than the sum of its proper divisors (1).

122199421427 is an equidigital number, since it uses as much as digits as its factorization.

122199421427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

It can be divided in two parts, 1221994 and 21427, that added together give a palindrome (1243421).

The spelling of 122199421427 in words is "one hundred twenty-two billion, one hundred ninety-nine million, four hundred twenty-one thousand, four hundred twenty-seven".