122986921 has 8 divisors (see below), whose sum is σ = 128669184. Its totient is φ = 117432480.

The previous prime is 122986909. The next prime is 122986931. The reversal of 122986921 is 129689221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122986921 - 2¹³ = 122978729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122986901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29985 + ... + 33838.

It is an arithmetic number, because the mean of its divisors is an integer number (16083648).

Almost surely, 2^122986921 is an apocalyptic number.

It is an amenable number.

122986921 is a deficient number, since it is larger than the sum of its proper divisors (5682263).

122986921 is an equidigital number, since it uses as much as digits as its factorization.

122986921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63911.

The product of its digits is 31104, while the sum is 40.

The square root of 122986921 is about 11089.9468438762. The cubic root of 122986921 is about 497.3013555070.

The spelling of 122986921 in words is "one hundred twenty-two million, nine hundred eighty-six thousand, nine hundred twenty-one".