122981166 has 80 divisors (see below), whose sum is σ = 343601280. Its totient is φ = 31939920.

The previous prime is 122981153. The next prime is 122981171. The reversal of 122981166 is 661189221.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 122981166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7545 + ... + 17403.

It is an arithmetic number, because the mean of its divisors is an integer number (4295016).

Almost surely, 2^122981166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122981166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171800640).

122981166 is an abundant number, since it is smaller than the sum of its proper divisors (220620114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122981166 is a wasteful number, since it uses less digits than its factorization.

122981166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9891 (or 9882 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 122981166 is about 11089.6873716079. The cubic root of 122981166 is about 497.2935985468.

The spelling of 122981166 in words is "one hundred twenty-two million, nine hundred eighty-one thousand, one hundred sixty-six".