331132020233221 has 4 divisors (see below), whose sum is σ = 331216773761632. Its totient is φ = 331047266704812.

The previous prime is 331132020233219. The next prime is 331132020233251. The reversal of 331132020233221 is 122332020231133.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 331132020233221 - 2¹ = 331132020233219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 331132020233221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331132020233251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42376758345 + ... + 42376766158.

It is an arithmetic number, because the mean of its divisors is an integer number (82804193440408).

Almost surely, 2^{331132020233221} is an apocalyptic number.

It is an amenable number.

331132020233221 is a deficient number, since it is larger than the sum of its proper divisors (84753528411).

331132020233221 is an equidigital number, since it uses as much as digits as its factorization.

331132020233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84753528410.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 331132020233221 its reverse (122332020231133), we get a palindrome (453464040464354).

The spelling of 331132020233221 in words is "three hundred thirty-one trillion, one hundred thirty-two billion, twenty million, two hundred thirty-three thousand, two hundred twenty-one".