30121255252 has 12 divisors (see below), whose sum is σ = 57504214656. Its totient is φ = 13691479640.

The previous prime is 30121255181. The next prime is 30121255261. The reversal of 30121255252 is 25255212103.

It is a super-2 number, since 2×30121255252² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30121255252.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342286948 + ... + 342287035.

It is an arithmetic number, because the mean of its divisors is an integer number (4792017888).

Almost surely, 2^30121255252 is an apocalyptic number.

It is an amenable number.

30121255252 is a deficient number, since it is larger than the sum of its proper divisors (27382959404).

30121255252 is a wasteful number, since it uses less digits than its factorization.

30121255252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684573998 (or 684573996 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 30121255252 its reverse (25255212103), we get a palindrome (55376467355).

The spelling of 30121255252 in words is "thirty billion, one hundred twenty-one million, two hundred fifty-five thousand, two hundred fifty-two".