1311221322984 has 16 divisors (see below), whose sum is σ = 3278053307520. Its totient is φ = 437073774320.

The previous prime is 1311221322979. The next prime is 1311221323079. The reversal of 1311221322984 is 4892231221131.

It is a super-2 number, since 2×1311221322984² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27317110872 + ... + 27317110919.

It is an arithmetic number, because the mean of its divisors is an integer number (204878331720).

Almost surely, 2^{1311221322984} is an apocalyptic number.

It is an amenable number.

1311221322984 is an abundant number, since it is smaller than the sum of its proper divisors (1966831984536).

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

1311221322984 is a wasteful number, since it uses less digits than its factorization.

1311221322984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54634221800 (or 54634221796 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The spelling of 1311221322984 in words is "one trillion, three hundred eleven billion, two hundred twenty-one million, three hundred twenty-two thousand, nine hundred eighty-four".