2221211986 has 32 divisors (see below), whose sum is σ = 4025088000. Its totient is φ = 898046352.

The previous prime is 2221211977. The next prime is 2221212011. The reversal of 2221211986 is 6891121222.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46105 + ... + 81043.

It is an arithmetic number, because the mean of its divisors is an integer number (125784000).

Almost surely, 2^2221211986 is an apocalyptic number.

2221211986 is a deficient number, since it is larger than the sum of its proper divisors (1803876014).

2221211986 is a wasteful number, since it uses less digits than its factorization.

2221211986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35206.

The product of its digits is 6912, while the sum is 34.

The square root of 2221211986 is about 47129.7356877800. The cubic root of 2221211986 is about 1304.7581033615.

The spelling of 2221211986 in words is "two billion, two hundred twenty-one million, two hundred eleven thousand, nine hundred eighty-six".