221021011332 has 72 divisors (see below), whose sum is σ = 609869900640. Its totient is φ = 66933457920.

The previous prime is 221021011331. The next prime is 221021011349. The reversal of 221021011332 is 233110120122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (221021011331) 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, 448548 + ... + 802020.

Almost surely, 2^221021011332 is an apocalyptic number.

221021011332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221021011332 is an abundant number, since it is smaller than the sum of its proper divisors (388848889308).

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

221021011332 is a wasteful number, since it uses less digits than its factorization.

221021011332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355073 (or 355068 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 221021011332 its reverse (233110120122), we get a palindrome (454131131454).

The spelling of 221021011332 in words is "two hundred twenty-one billion, twenty-one million, eleven thousand, three hundred thirty-two".