20121134530 has 32 divisors (see below), whose sum is σ = 41421219840. Its totient is φ = 6893812800.

The previous prime is 20121134521. The next prime is 20121134549. The reversal of 20121134530 is 3543112102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 546 + ... + 200605.

It is an arithmetic number, because the mean of its divisors is an integer number (1294413120).

Almost surely, 2^20121134530 is an apocalyptic number.

20121134530 is an abundant number, since it is smaller than the sum of its proper divisors (21300085310).

20121134530 is a wasteful number, since it uses less digits than its factorization.

20121134530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202594.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 20121134530 its reverse (3543112102), we get a palindrome (23664246632).

The spelling of 20121134530 in words is "twenty billion, one hundred twenty-one million, one hundred thirty-four thousand, five hundred thirty".