122988981 has 16 divisors (see below), whose sum is σ = 174021120. Its totient is φ = 77095920.

The previous prime is 122988979. The next prime is 122989001. The reversal of 122988981 is 189889221.

It is not a de Polignac number, because 122988981 - 2¹ = 122988979 is a prime.

It is a super-2 number, since 2×122988981² = 30252578894836722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 122988981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122988941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11035 + ... + 19176.

It is an arithmetic number, because the mean of its divisors is an integer number (10876320).

Almost surely, 2^122988981 is an apocalyptic number.

It is an amenable number.

122988981 is a deficient number, since it is larger than the sum of its proper divisors (51032139).

122988981 is a wasteful number, since it uses less digits than its factorization.

122988981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30296.

The product of its digits is 165888, while the sum is 48.

The square root of 122988981 is about 11090.0397203978. The cubic root of 122988981 is about 497.3041320490.

The spelling of 122988981 in words is "one hundred twenty-two million, nine hundred eighty-eight thousand, nine hundred eighty-one".