20121134512 has 10 divisors (see below), whose sum is σ = 38984698148. Its totient is φ = 10060567248.

The previous prime is 20121134503. The next prime is 20121134521. The reversal of 20121134512 is 21543112102.

It is an interprime number because it is at equal distance from previous prime (20121134503) and next prime (20121134521).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628785438 + ... + 628785469.

Almost surely, 2^20121134512 is an apocalyptic number.

It is an amenable number.

20121134512 is a deficient number, since it is larger than the sum of its proper divisors (18863563636).

20121134512 is a wasteful number, since it uses less digits than its factorization.

20121134512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257570915 (or 1257570909 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 20121134512 its reverse (21543112102), we get a palindrome (41664246614).

The spelling of 20121134512 in words is "twenty billion, one hundred twenty-one million, one hundred thirty-four thousand, five hundred twelve".