212202112321 has 4 divisors (see below), whose sum is σ = 213027801732. Its totient is φ = 211376422912.

The previous prime is 212202112307. The next prime is 212202112363. The reversal of 212202112321 is 123211202212.

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 171574066225 + 40628046096 = 414215^2 + 201564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212202112321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212202112301) 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, 412844320 + ... + 412844833.

It is an arithmetic number, because the mean of its divisors is an integer number (53256950433).

Almost surely, 2^212202112321 is an apocalyptic number.

It is an amenable number.

212202112321 is a deficient number, since it is larger than the sum of its proper divisors (825689411).

212202112321 is an equidigital number, since it uses as much as digits as its factorization.

212202112321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825689410.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212202112321 its reverse (123211202212), we get a palindrome (335413314533).

The spelling of 212202112321 in words is "two hundred twelve billion, two hundred two million, one hundred twelve thousand, three hundred twenty-one".