3991111222 has 16 divisors (see below), whose sum is σ = 6843303072. Its totient is φ = 1710126720.

The previous prime is 3991111219. The next prime is 3991111231. The reversal of 3991111222 is 2221111993.

It is a congruent number.

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, 49072 + ... + 101932.

It is an arithmetic number, because the mean of its divisors is an integer number (427706442).

Almost surely, 2^3991111222 is an apocalyptic number.

3991111222 is a deficient number, since it is larger than the sum of its proper divisors (2852191850).

3991111222 is a wasteful number, since it uses less digits than its factorization.

3991111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58263.

The product of its digits is 1944, while the sum is 31.

The square root of 3991111222 is about 63175.2421602007. The cubic root of 3991111222 is about 1586.2243419488.

The spelling of 3991111222 in words is "three billion, nine hundred ninety-one million, one hundred eleven thousand, two hundred twenty-two".