20121010012 has 24 divisors (see below), whose sum is σ = 36570481920. Its totient is φ = 9679557360.

The previous prime is 20121009989. The next prime is 20121010037. The reversal of 20121010012 is 21001012102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 895914 + ... + 918097.

It is an arithmetic number, because the mean of its divisors is an integer number (1523770080).

Almost surely, 2^20121010012 is an apocalyptic number.

It is an amenable number.

20121010012 is a deficient number, since it is larger than the sum of its proper divisors (16449471908).

20121010012 is a wasteful number, since it uses less digits than its factorization.

20121010012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814121 (or 1814119 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20121010012 its reverse (21001012102), we get a palindrome (41122022114).

The spelling of 20121010012 in words is "twenty billion, one hundred twenty-one million, ten thousand, twelve".