122520621 has 16 divisors (see below), whose sum is σ = 169329600. Its totient is φ = 78707328.

The previous prime is 122520613. The next prime is 122520637. The reversal of 122520621 is 126025221.

It is a happy number.

It is not a de Polignac number, because 122520621 - 2³ = 122520613 is a prime.

It is a super-2 number, since 2×122520621² = 30022605140451282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122520641) 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 15 ways as a sum of consecutive naturals, for example, 56265 + ... + 58401.

It is an arithmetic number, because the mean of its divisors is an integer number (10583100).

Almost surely, 2^122520621 is an apocalyptic number.

It is an amenable number.

122520621 is a deficient number, since it is larger than the sum of its proper divisors (46808979).

122520621 is a wasteful number, since it uses less digits than its factorization.

122520621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 122520621 is about 11068.9033332124. The cubic root of 122520621 is about 496.6720601089.

Adding to 122520621 its reverse (126025221), we get a palindrome (248545842).

The spelling of 122520621 in words is "one hundred twenty-two million, five hundred twenty thousand, six hundred twenty-one".