122138892549 has 16 divisors (see below), whose sum is σ = 183236972800. Its totient is φ = 80395219008.

The previous prime is 122138892511. The next prime is 122138892569. The reversal of 122138892549 is 945298831221.

122138892549 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 3 + 8 + 8 + 92 + 549 = 666.

It is not a de Polignac number, because 122138892549 - 2²⁴ = 122122115333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122138892495 and 122138892504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122138892509) 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, 28628644 + ... + 28632909.

It is an arithmetic number, because the mean of its divisors is an integer number (11452310800).

Almost surely, 2^122138892549 is an apocalyptic number.

It is an amenable number.

122138892549 is a deficient number, since it is larger than the sum of its proper divisors (61098080251).

122138892549 is an equidigital number, since it uses as much as digits as its factorization.

122138892549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57261641 (or 57261635 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The spelling of 122138892549 in words is "one hundred twenty-two billion, one hundred thirty-eight million, eight hundred ninety-two thousand, five hundred forty-nine".