1221110984 has 16 divisors (see below), whose sum is σ = 2298708720. Its totient is φ = 608122000.

The previous prime is 1221110983. The next prime is 1221111007. The reversal of 1221110984 is 4890111221.

It is a super-2 number, since 2×1221110984² = 2982224070490896512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221110983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302054 + ... + 306069.

It is an arithmetic number, because the mean of its divisors is an integer number (143669295).

Almost surely, 2^1221110984 is an apocalyptic number.

It is an amenable number.

1221110984 is a deficient number, since it is larger than the sum of its proper divisors (1077597736).

1221110984 is a wasteful number, since it uses less digits than its factorization.

1221110984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608380 (or 608376 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 1221110984 is about 34944.3984638454. The cubic root of 1221110984 is about 1068.8539813152.

The spelling of 1221110984 in words is "one billion, two hundred twenty-one million, one hundred ten thousand, nine hundred eighty-four".