122118981 has 8 divisors (see below), whose sum is σ = 167226144. Its totient is φ = 79212240.

The previous prime is 122118977. The next prime is 122118989. The reversal of 122118981 is 189811221.

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

It is not a de Polignac number, because 122118981 - 2² = 122118977 is a prime.

It is a super-2 number, since 2×122118981² = 29826091040956722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122118989) 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, 549975 + ... + 550196.

It is an arithmetic number, because the mean of its divisors is an integer number (20903268).

Almost surely, 2^122118981 is an apocalyptic number.

It is an amenable number.

122118981 is a deficient number, since it is larger than the sum of its proper divisors (45107163).

122118981 is a wasteful number, since it uses less digits than its factorization.

122118981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100211.

The product of its digits is 2304, while the sum is 33.

The square root of 122118981 is about 11050.7457214434. The cubic root of 122118981 is about 496.1287454660.

It can be divided in two parts, 1221 and 18981, that added together give a palindrome (20202).

The spelling of 122118981 in words is "one hundred twenty-two million, one hundred eighteen thousand, nine hundred eighty-one".