232221312122021 has 4 divisors (see below), whose sum is σ = 232221407680044. Its totient is φ = 232221216564000.

The previous prime is 232221312122003. The next prime is 232221312122089. The reversal of 232221312122021 is 120221213122232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51706367829796 + 180514944292225 = 7190714^2 + 13435585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232221312122021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232221312125021) 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, 44036030 + ... + 49026671.

It is an arithmetic number, because the mean of its divisors is an integer number (58055351920011).

Almost surely, 2^{232221312122021} is an apocalyptic number.

It is an amenable number.

232221312122021 is a deficient number, since it is larger than the sum of its proper divisors (95558023).

232221312122021 is an equidigital number, since it uses as much as digits as its factorization.

232221312122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95558022.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 232221312122021 its reverse (120221213122232), we get a palindrome (352442525244253).

The spelling of 232221312122021 in words is "two hundred thirty-two trillion, two hundred twenty-one billion, three hundred twelve million, one hundred twenty-two thousand, twenty-one".