20121211012 has 12 divisors (see below), whose sum is σ = 40242422080. Its totient is φ = 8623376136.

The previous prime is 20121211001. The next prime is 20121211021. The reversal of 20121211012 is 21011212102.

20121211012 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 20121210983 and 20121211001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359307312 + ... + 359307367.

Almost surely, 2^20121211012 is an apocalyptic number.

It is an amenable number.

20121211012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121211012 is a wasteful number, since it uses less digits than its factorization.

20121211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718614690 (or 718614688 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20121211012 its reverse (21011212102), we get a palindrome (41132423114).

The spelling of 20121211012 in words is "twenty billion, one hundred twenty-one million, two hundred eleven thousand, twelve".