122551321 has 4 divisors (see below), whose sum is σ = 122641444. Its totient is φ = 122461200.

The previous prime is 122551307. The next prime is 122551327. The reversal of 122551321 is 123155221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123155221 = 7 ⋅17593603.

It can be written as a sum of positive squares in 2 ways, for example, as 40449600 + 82101721 = 6360^2 + 9061^2 .

It is a cyclic number.

It is not a de Polignac number, because 122551321 - 2²⁵ = 88996889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122551292 and 122551301.

It is not an unprimeable number, because it can be changed into a prime (122551327) 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, 42990 + ... + 45751.

It is an arithmetic number, because the mean of its divisors is an integer number (30660361).

Almost surely, 2^122551321 is an apocalyptic number.

It is an amenable number.

122551321 is a deficient number, since it is larger than the sum of its proper divisors (90123).

122551321 is an equidigital number, since it uses as much as digits as its factorization.

122551321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90122.

The product of its digits is 600, while the sum is 22.

The square root of 122551321 is about 11070.2900142679. The cubic root of 122551321 is about 496.7135403614.

The spelling of 122551321 in words is "one hundred twenty-two million, five hundred fifty-one thousand, three hundred twenty-one".