122520121 has 4 divisors (see below), whose sum is σ = 123136000. Its totient is φ = 121904244.

The previous prime is 122520119. The next prime is 122520127. The reversal of 122520121 is 121025221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122520121 - 2¹ = 122520119 is a prime.

It is a super-2 number, since 2×122520121² = 30022360099709282, 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 = 122520095 and 122520104.

It is not an unprimeable number, because it can be changed into a prime (122520127) 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 3 ways as a sum of consecutive naturals, for example, 307641 + ... + 308038.

It is an arithmetic number, because the mean of its divisors is an integer number (30784000).

Almost surely, 2^122520121 is an apocalyptic number.

It is an amenable number.

122520121 is a deficient number, since it is larger than the sum of its proper divisors (615879).

122520121 is an equidigital number, since it uses as much as digits as its factorization.

122520121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615878.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 122520121 is about 11068.8807473927. The cubic root of 122520121 is about 496.6713844774.

Adding to 122520121 its reverse (121025221), we get a palindrome (243545342).

The spelling of 122520121 in words is "one hundred twenty-two million, five hundred twenty thousand, one hundred twenty-one".