30121235502 has 16 divisors (see below), whose sum is σ = 61870646352. Its totient is φ = 9769049280.

The previous prime is 30121235491. The next prime is 30121235509. The reversal of 30121235502 is 20553212103.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121235509) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 67840399 + ... + 67840842.

It is an arithmetic number, because the mean of its divisors is an integer number (3866915397).

Almost surely, 2^30121235502 is an apocalyptic number.

30121235502 is an abundant number, since it is smaller than the sum of its proper divisors (31749410850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30121235502 is a wasteful number, since it uses less digits than its factorization.

30121235502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135681283.

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 30121235502 its reverse (20553212103), we get a palindrome (50674447605).

The spelling of 30121235502 in words is "thirty billion, one hundred twenty-one million, two hundred thirty-five thousand, five hundred two".