122212374947891 has 2 divisors, whose sum is σ = 122212374947892. Its totient is φ = 122212374947890.

The previous prime is 122212374947869. The next prime is 122212374947899. The reversal of 122212374947891 is 198749473212221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122212374947891 is a prime.

It is not a weakly prime, because it can be changed into another prime (122212374947899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61106187473945 + 61106187473946.

It is an arithmetic number, because the mean of its divisors is an integer number (61106187473946).

Almost surely, 2^{122212374947891} is an apocalyptic number.

122212374947891 is a deficient number, since it is larger than the sum of its proper divisors (1).

122212374947891 is an equidigital number, since it uses as much as digits as its factorization.

122212374947891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24385536, while the sum is 62.

The spelling of 122212374947891 in words is "one hundred twenty-two trillion, two hundred twelve billion, three hundred seventy-four million, nine hundred forty-seven thousand, eight hundred ninety-one".