1221133334412 has 24 divisors (see below), whose sum is σ = 2849768714800. Its totient is φ = 406979073216.

The previous prime is 1221133334363. The next prime is 1221133334437. The reversal of 1221133334412 is 2144333311221.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1221133334412.

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, 8093587 + ... + 8243082.

Almost surely, 2^{1221133334412} is an apocalyptic number.

1221133334412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221133334412 is an abundant number, since it is smaller than the sum of its proper divisors (1628635380388).

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

1221133334412 is a wasteful number, since it uses less digits than its factorization.

1221133334412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16342905 (or 16342903 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

Adding to 1221133334412 its reverse (2144333311221), we get a palindrome (3365466645633).

The spelling of 1221133334412 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-three million, three hundred thirty-four thousand, four hundred twelve".