221964098172 has 72 divisors (see below), whose sum is σ = 554619228240. Its totient is φ = 69044954880.

The previous prime is 221964098171. The next prime is 221964098173. The reversal of 221964098172 is 271890469122.

It is an interprime number because it is at equal distance from previous prime (221964098171) and next prime (221964098173).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221964098171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166147 + ... + 686682.

Almost surely, 2^221964098172 is an apocalyptic number.

It is an amenable number.

221964098172 is an abundant number, since it is smaller than the sum of its proper divisors (332655130068).

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

221964098172 is a wasteful number, since it uses less digits than its factorization.

221964098172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852923 (or 852898 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 221964098172 in words is "two hundred twenty-one billion, nine hundred sixty-four million, ninety-eight thousand, one hundred seventy-two".