221001022199964 has 12 divisors (see below), whose sum is σ = 515669051799944. Its totient is φ = 73667007399984.

The previous prime is 221001022199939. The next prime is 221001022200043. The reversal of 221001022199964 is 469991220100122.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9208375924987 + ... + 9208375925010.

Almost surely, 2^{221001022199964} is an apocalyptic number.

It is an amenable number.

221001022199964 is an abundant number, since it is smaller than the sum of its proper divisors (294668029599980).

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

221001022199964 is a wasteful number, since it uses less digits than its factorization.

221001022199964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18416751850004 (or 18416751850002 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 48.

The spelling of 221001022199964 in words is "two hundred twenty-one trillion, one billion, twenty-two million, one hundred ninety-nine thousand, nine hundred sixty-four".