210112102002221 has 4 divisors (see below), whose sum is σ = 213556562690844. Its totient is φ = 206667641313600.

The previous prime is 210112102002161. The next prime is 210112102002287. The reversal of 210112102002221 is 122200201211012.

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 17751568254121 + 192360533748100 = 4213261^2 + 13869410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210112102002221 is a prime.

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 210112102002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210112102032221) 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, 1722230344220 + ... + 1722230344341.

It is an arithmetic number, because the mean of its divisors is an integer number (53389140672711).

Almost surely, 2^{210112102002221} is an apocalyptic number.

It is an amenable number.

210112102002221 is a deficient number, since it is larger than the sum of its proper divisors (3444460688623).

210112102002221 is an equidigital number, since it uses as much as digits as its factorization.

210112102002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3444460688622.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210112102002221 its reverse (122200201211012), we get a palindrome (332312303213233).

The spelling of 210112102002221 in words is "two hundred ten trillion, one hundred twelve billion, one hundred two million, two thousand, two hundred twenty-one".