20121012512 has 12 divisors (see below), whose sum is σ = 39613243446. Its totient is φ = 10060506240.

The previous prime is 20121012511. The next prime is 20121012529. The reversal of 20121012512 is 21521012102.

It can be written as a sum of positive squares in only one way, i.e., 19645946896 + 475065616 = 140164^2 + 21796^2 .

It is not an unprimeable number, because it can be changed into a prime (20121012511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314390789 + ... + 314390852.

Almost surely, 2^20121012512 is an apocalyptic number.

It is an amenable number.

20121012512 is a deficient number, since it is larger than the sum of its proper divisors (19492230934).

20121012512 is an equidigital number, since it uses as much as digits as its factorization.

20121012512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628781651 (or 628781643 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 20121012512 its reverse (21521012102), we get a palindrome (41642024614).

The spelling of 20121012512 in words is "twenty billion, one hundred twenty-one million, twelve thousand, five hundred twelve".