121220252 has 12 divisors (see below), whose sum is σ = 212272200. Its totient is φ = 60571056.

The previous prime is 121220243. The next prime is 121220269. The reversal of 121220252 is 252022121.

It is a self number, because there is not a number n which added to its sum of digits gives 121220252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2123 + ... + 15714.

It is an arithmetic number, because the mean of its divisors is an integer number (17689350).

Almost surely, 2^121220252 is an apocalyptic number.

It is an amenable number.

121220252 is a deficient number, since it is larger than the sum of its proper divisors (91051948).

121220252 is a wasteful number, since it uses less digits than its factorization.

121220252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19540 (or 19538 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 121220252 is about 11010.0069028135. The cubic root of 121220252 is about 494.9086686580.

Subtracting from 121220252 its sum of digits (17), we obtain a triangular number (121220235 = T₁₅₅₇₀).

Adding to 121220252 its reverse (252022121), we get a palindrome (373242373).

The spelling of 121220252 in words is "one hundred twenty-one million, two hundred twenty thousand, two hundred fifty-two".