2221221982 has 16 divisors (see below), whose sum is σ = 3930642432. Its totient is φ = 921243960.

The previous prime is 2221221979. The next prime is 2221221991. The reversal of 2221221982 is 2891221222.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2558578 + ... + 2559445.

It is an arithmetic number, because the mean of its divisors is an integer number (245665152).

Almost surely, 2^2221221982 is an apocalyptic number.

2221221982 is a deficient number, since it is larger than the sum of its proper divisors (1709420450).

2221221982 is a wasteful number, since it uses less digits than its factorization.

2221221982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5118063.

The product of its digits is 4608, while the sum is 31.

The square root of 2221221982 is about 47129.8417353591. The cubic root of 2221221982 is about 1304.7600606027.

The spelling of 2221221982 in words is "two billion, two hundred twenty-one million, two hundred twenty-one thousand, nine hundred eighty-two".