1212103211200 has 84 divisors (see below), whose sum is σ = 3408607418992. Its totient is φ = 415578240000.

The previous prime is 1212103211161. The next prime is 1212103211219. The reversal of 1212103211200 is 21123012121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54100551 + ... + 54122950.

Almost surely, 2^{1212103211200} is an apocalyptic number.

1212103211200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212103211200 is an abundant number, since it is smaller than the sum of its proper divisors (2196504207792).

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

1212103211200 is a wasteful number, since it uses less digits than its factorization.

1212103211200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108223530 (or 108223515 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1212103211200 its reverse (21123012121), we get a palindrome (1233226223321).

The spelling of 1212103211200 in words is "one trillion, two hundred twelve billion, one hundred three million, two hundred eleven thousand, two hundred".