202122331231321 has 4 divisors (see below), whose sum is σ = 205935960122532. Its totient is φ = 198308702340112.

The previous prime is 202122331231319. The next prime is 202122331231333. The reversal of 202122331231321 is 123132133221202.

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 52104417918921 + 150017913312400 = 7218339^2 + 12248180^2 .

It is a cyclic number.

It is not a de Polignac number, because 202122331231321 - 2¹ = 202122331231319 is a prime.

It is a super-2 number, since 2×202122331231321² (a number of 29 digits) contains 22 as substring.

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 202122331231321.

It is not an unprimeable number, because it can be changed into a prime (202122631231321) 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, 1906814445526 + ... + 1906814445631.

It is an arithmetic number, because the mean of its divisors is an integer number (51483990030633).

Almost surely, 2^{202122331231321} is an apocalyptic number.

It is an amenable number.

202122331231321 is a deficient number, since it is larger than the sum of its proper divisors (3813628891211).

202122331231321 is an equidigital number, since it uses as much as digits as its factorization.

202122331231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3813628891210.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 202122331231321 its reverse (123132133221202), we get a palindrome (325254464452523).

The spelling of 202122331231321 in words is "two hundred two trillion, one hundred twenty-two billion, three hundred thirty-one million, two hundred thirty-one thousand, three hundred twenty-one".