1211221112000 has 56 divisors (see below), whose sum is σ = 2999589103680. Its totient is φ = 484488441600.

The previous prime is 1211221111967. The next prime is 1211221112011. The reversal of 1211221112000 is 2111221121.

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, 75693320 + ... + 75709319.

Almost surely, 2^{1211221112000} is an apocalyptic number.

1211221112000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211221112000 is an abundant number, since it is smaller than the sum of its proper divisors (1788367991680).

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

1211221112000 is an equidigital number, since it uses as much as digits as its factorization.

1211221112000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151402666 (or 151402646 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211221112000 its reverse (2111221121), we get a palindrome (1213332333121).

The spelling of 1211221112000 in words is "one trillion, two hundred eleven billion, two hundred twenty-one million, one hundred twelve thousand".