20121304012 has 6 divisors (see below), whose sum is σ = 35212282028. Its totient is φ = 10060652004.

The previous prime is 20121303953. The next prime is 20121304031. The reversal of 20121304012 is 21040312102.

It is a super-2 number, since 2×20121304012² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2515162998 + ... + 2515163005.

Almost surely, 2^20121304012 is an apocalyptic number.

It is an amenable number.

20121304012 is a deficient number, since it is larger than the sum of its proper divisors (15090978016).

20121304012 is a wasteful number, since it uses less digits than its factorization.

20121304012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5030326007 (or 5030326005 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20121304012 its reverse (21040312102), we get a palindrome (41161616114).

The spelling of 20121304012 in words is "twenty billion, one hundred twenty-one million, three hundred four thousand, twelve".