122189831 has 4 divisors (see below), whose sum is σ = 122220792. Its totient is φ = 122158872.

The previous prime is 122189819. The next prime is 122189839. The reversal of 122189831 is 138981221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122189831 is a prime.

It is a super-2 number, since 2×122189831² = 29860709599617122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122189791 and 122189800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122189839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8516 + ... + 17801.

It is an arithmetic number, because the mean of its divisors is an integer number (30555198).

Almost surely, 2^122189831 is an apocalyptic number.

122189831 is a deficient number, since it is larger than the sum of its proper divisors (30961).

122189831 is an equidigital number, since it uses as much as digits as its factorization.

122189831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30960.

The product of its digits is 6912, while the sum is 35.

The square root of 122189831 is about 11053.9509226340. The cubic root of 122189831 is about 496.2246735674.

The spelling of 122189831 in words is "one hundred twenty-two million, one hundred eighty-nine thousand, eight hundred thirty-one".