210111110002221 has 16 divisors (see below), whose sum is σ = 283300114135680. Its totient is φ = 138498136663040.

The previous prime is 210111110002207. The next prime is 210111110002223. The reversal of 210111110002221 is 122200011111012.

It is a happy number.

210111110002221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 210111110002221 - 2³⁴ = 210093930133037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210111110002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210111110002223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12112381 + ... + 23810333.

It is an arithmetic number, because the mean of its divisors is an integer number (17706257133480).

Almost surely, 2^{210111110002221} is an apocalyptic number.

It is an amenable number.

210111110002221 is a deficient number, since it is larger than the sum of its proper divisors (73189004133459).

210111110002221 is a wasteful number, since it uses less digits than its factorization.

210111110002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11765316.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210111110002221 its reverse (122200011111012), we get a palindrome (332311121113233).

The spelling of 210111110002221 in words is "two hundred ten trillion, one hundred eleven billion, one hundred ten million, two thousand, two hundred twenty-one".