122218973491 has 2 divisors, whose sum is σ = 122218973492. Its totient is φ = 122218973490.

The previous prime is 122218973423. The next prime is 122218973497. The reversal of 122218973491 is 194379812221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122218973491 - 2¹⁹ = 122218449203 is a prime.

It is not a weakly prime, because it can be changed into another prime (122218973497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61109486745 + 61109486746.

It is an arithmetic number, because the mean of its divisors is an integer number (61109486746).

Almost surely, 2^122218973491 is an apocalyptic number.

122218973491 is a deficient number, since it is larger than the sum of its proper divisors (1).

122218973491 is an equidigital number, since it uses as much as digits as its factorization.

122218973491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The spelling of 122218973491 in words is "one hundred twenty-two billion, two hundred eighteen million, nine hundred seventy-three thousand, four hundred ninety-one".