221001221020986 has 24 divisors (see below), whose sum is σ = 547241118718944. Its totient is φ = 63143206005960.

The previous prime is 221001221020969. The next prime is 221001221021029. The reversal of 221001221020986 is 689020122100122.

221001221020986 is a `hidden beast` number, since 221 + 0 + 0 + 1 + 221 + 0 + 209 + 8 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 221001221020986.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 876988972180 + ... + 876988972431.

It is an arithmetic number, because the mean of its divisors is an integer number (22801713279956).

Almost surely, 2^{221001221020986} is an apocalyptic number.

221001221020986 is an abundant number, since it is smaller than the sum of its proper divisors (326239897697958).

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

221001221020986 is a wasteful number, since it uses less digits than its factorization.

221001221020986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753977944626 (or 1753977944623 counting only the distinct ones).

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

The spelling of 221001221020986 in words is "two hundred twenty-one trillion, one billion, two hundred twenty-one million, twenty thousand, nine hundred eighty-six".