122181749460 has 120 divisors (see below), whose sum is σ = 386681187816. Its totient is φ = 32293416960.

The previous prime is 122181749447. The next prime is 122181749483. The reversal of 122181749460 is 64947181221.

122181749460 is a `hidden beast` number, since 1 + 2 + 2 + 18 + 174 + 9 + 460 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5303917584 + 116877831876 = 72828^2 + 341874^2 .

It is a super-2 number, since 2×122181749460² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 150661 + ... + 516780.

Almost surely, 2^122181749460 is an apocalyptic number.

122181749460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122181749460 is an abundant number, since it is smaller than the sum of its proper divisors (264499438356).

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

122181749460 is a wasteful number, since it uses less digits than its factorization.

122181749460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667575 (or 667564 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 122181749460 in words is "one hundred twenty-two billion, one hundred eighty-one million, seven hundred forty-nine thousand, four hundred sixty".