221991210232 has 32 divisors (see below), whose sum is σ = 454159606320. Its totient is φ = 100885834240.

The previous prime is 221991210179. The next prime is 221991210239. The reversal of 221991210232 is 232012199122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221991210239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228018 + ... + 704254.

Almost surely, 2^221991210232 is an apocalyptic number.

221991210232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221991210232 is an abundant number, since it is smaller than the sum of its proper divisors (232168396088).

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

221991210232 is a wasteful number, since it uses less digits than its factorization.

221991210232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481551 (or 481547 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The spelling of 221991210232 in words is "two hundred twenty-one billion, nine hundred ninety-one million, two hundred ten thousand, two hundred thirty-two".