2221201021986 has 32 divisors (see below), whose sum is σ = 4938102086400. Its totient is φ = 740085368400.

The previous prime is 2221201021973. The next prime is 2221201022023. The reversal of 2221201021986 is 6891201021222.

It is a self number, because there is not a number n which added to its sum of digits gives 2221201021986.

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, 8621101 + ... + 8875008.

It is an arithmetic number, because the mean of its divisors is an integer number (154315690200).

Almost surely, 2^{2221201021986} is an apocalyptic number.

2221201021986 is an abundant number, since it is smaller than the sum of its proper divisors (2716901064414).

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

2221201021986 is a wasteful number, since it uses less digits than its factorization.

2221201021986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17498471 (or 17498465 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 2221201021986 in words is "two trillion, two hundred twenty-one billion, two hundred one million, twenty-one thousand, nine hundred eighty-six".