212204220331 has 4 divisors (see below), whose sum is σ = 217379933064. Its totient is φ = 207028507600.

The previous prime is 212204220311. The next prime is 212204220337. The reversal of 212204220331 is 133022402212.

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

It is a cyclic number.

It is not a de Polignac number, because 212204220331 - 2⁷ = 212204220203 is a prime.

It is a super-2 number, since 2×212204220331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212204220337) 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, 2587856305 + ... + 2587856386.

It is an arithmetic number, because the mean of its divisors is an integer number (54344983266).

Almost surely, 2^212204220331 is an apocalyptic number.

212204220331 is a deficient number, since it is larger than the sum of its proper divisors (5175712733).

212204220331 is an equidigital number, since it uses as much as digits as its factorization.

212204220331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5175712732.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 212204220331 its reverse (133022402212), we get a palindrome (345226622543).

The spelling of 212204220331 in words is "two hundred twelve billion, two hundred four million, two hundred twenty thousand, three hundred thirty-one".