221302032031020 has 96 divisors (see below), whose sum is σ = 657158801761728. Its totient is φ = 55452450414592.

The previous prime is 221302032031001. The next prime is 221302032031027. The reversal of 221302032031020 is 20130230203122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221302032031027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175191387 + ... + 176450066.

It is an arithmetic number, because the mean of its divisors is an integer number (6845404185018).

Almost surely, 2^{221302032031020} is an apocalyptic number.

221302032031020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221302032031020 is an abundant number, since it is smaller than the sum of its proper divisors (435856769730708).

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

221302032031020 is a wasteful number, since it uses less digits than its factorization.

221302032031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351642099 (or 351642097 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 221302032031020 its reverse (20130230203122), we get a palindrome (241432262234142).

The spelling of 221302032031020 in words is "two hundred twenty-one trillion, three hundred two billion, thirty-two million, thirty-one thousand, twenty".