122618333991 has 8 divisors (see below), whose sum is σ = 163492842240. Its totient is φ = 81744690872.

The previous prime is 122618333947. The next prime is 122618334017. The reversal of 122618333991 is 199333816221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122618333991 - 2⁷ = 122618333863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122618333991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122618333191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271756 + ... + 564878.

It is an arithmetic number, because the mean of its divisors is an integer number (20436605280).

Almost surely, 2^122618333991 is an apocalyptic number.

122618333991 is a deficient number, since it is larger than the sum of its proper divisors (40874508249).

122618333991 is a wasteful number, since it uses less digits than its factorization.

122618333991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432565.

The product of its digits is 419904, while the sum is 48.

The spelling of 122618333991 in words is "one hundred twenty-two billion, six hundred eighteen million, three hundred thirty-three thousand, nine hundred ninety-one".