1211200020012 has 24 divisors (see below), whose sum is σ = 2902515364336. Its totient is φ = 392821627968.

The previous prime is 1211200019993. The next prime is 1211200020089. The reversal of 1211200020012 is 2100200021121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1211200020012.

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, 1363963543 + ... + 1363964430.

Almost surely, 2^{1211200020012} is an apocalyptic number.

1211200020012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211200020012 is an abundant number, since it is smaller than the sum of its proper divisors (1691315344324).

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

1211200020012 is a wasteful number, since it uses less digits than its factorization.

1211200020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727928017 (or 2727928015 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1211200020012 its reverse (2100200021121), we get a palindrome (3311400041133).

The spelling of 1211200020012 in words is "one trillion, two hundred eleven billion, two hundred million, twenty thousand, twelve".