123221425191 has 4 divisors (see below), whose sum is σ = 164295233592. Its totient is φ = 82147616792.

The previous prime is 123221425153. The next prime is 123221425199. The reversal of 123221425191 is 191524122321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123221425191 - 2¹⁸ = 123221163047 is a prime.

It is a super-2 number, since 2×123221425191² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123221425199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20536904196 + ... + 20536904201.

It is an arithmetic number, because the mean of its divisors is an integer number (41073808398).

Almost surely, 2^123221425191 is an apocalyptic number.

123221425191 is a deficient number, since it is larger than the sum of its proper divisors (41073808401).

123221425191 is an equidigital number, since it uses as much as digits as its factorization.

123221425191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41073808400.

The product of its digits is 8640, while the sum is 33.

The spelling of 123221425191 in words is "one hundred twenty-three billion, two hundred twenty-one million, four hundred twenty-five thousand, one hundred ninety-one".