122985947187 has 24 divisors (see below), whose sum is σ = 184475403280. Its totient is φ = 81979697916.

The previous prime is 122985947179. The next prime is 122985947213. The reversal of 122985947187 is 781749589221.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

122985947187 is a `hidden beast` number, since 1 + 2 + 2 + 9 + 85 + 9 + 471 + 87 = 666.

It is not a de Polignac number, because 122985947187 - 2³ = 122985947179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122985947587) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16396564 + ... + 16404062.

Almost surely, 2^122985947187 is an apocalyptic number.

122985947187 is a deficient number, since it is larger than the sum of its proper divisors (61489456093).

122985947187 is an frugal number, since it uses more digits than its factorization.

122985947187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15019 (or 7502 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 63.

The spelling of 122985947187 in words is "one hundred twenty-two billion, nine hundred eighty-five million, nine hundred forty-seven thousand, one hundred eighty-seven".