1200111321012 has 24 divisors (see below), whose sum is σ = 2800739491200. Its totient is φ = 399968572416.

The previous prime is 1200111320999. The next prime is 1200111321077. The reversal of 1200111321012 is 2101231110021.

It is a junction number, because it is equal to n+sod(n) for n = 1200111320982 and 1200111321000.

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, 8493837 + ... + 8633972.

It is an arithmetic number, because the mean of its divisors is an integer number (116697478800).

Almost surely, 2^{1200111321012} is an apocalyptic number.

1200111321012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1200111321012 is an abundant number, since it is smaller than the sum of its proper divisors (1600628170188).

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

1200111321012 is a wasteful number, since it uses less digits than its factorization.

1200111321012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17133655 (or 17133653 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1200111321012 its reverse (2101231110021), we get a palindrome (3301342431033).

The spelling of 1200111321012 in words is "one trillion, two hundred billion, one hundred eleven million, three hundred twenty-one thousand, twelve".