210112110021221 has 4 divisors (see below), whose sum is σ = 210112244613600. Its totient is φ = 210111975428844.

The previous prime is 210112110021131. The next prime is 210112110021227. The reversal of 210112110021221 is 122120011211012.

210112110021221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210112110021221 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 210112110021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210112110021227) 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, 64926731 + ... + 68086008.

It is an arithmetic number, because the mean of its divisors is an integer number (52528061153400).

Almost surely, 2^{210112110021221} is an apocalyptic number.

It is an amenable number.

210112110021221 is a deficient number, since it is larger than the sum of its proper divisors (134592379).

210112110021221 is a wasteful number, since it uses less digits than its factorization.

210112110021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134592378.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 210112110021221 its reverse (122120011211012), we get a palindrome (332232121232233).

The spelling of 210112110021221 in words is "two hundred ten trillion, one hundred twelve billion, one hundred ten million, twenty-one thousand, two hundred twenty-one".