210112313221 has 2 divisors, whose sum is σ = 210112313222. Its totient is φ = 210112313220.

The previous prime is 210112313207. The next prime is 210112313261. The reversal of 210112313221 is 122313211012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205621437025 + 4490876196 = 453455^2 + 67014^2 .

It is a cyclic number.

It is not a de Polignac number, because 210112313221 - 2⁵ = 210112313189 is a prime.

It is a super-2 number, since 2×210112313221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210112313261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105056156610 + 105056156611.

It is an arithmetic number, because the mean of its divisors is an integer number (105056156611).

Almost surely, 2^210112313221 is an apocalyptic number.

It is an amenable number.

210112313221 is a deficient number, since it is larger than the sum of its proper divisors (1).

210112313221 is an equidigital number, since it uses as much as digits as its factorization.

210112313221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 210112313221 its reverse (122313211012), we get a palindrome (332425524233).

The spelling of 210112313221 in words is "two hundred ten billion, one hundred twelve million, three hundred thirteen thousand, two hundred twenty-one".