210111022112221 has 16 divisors (see below), whose sum is σ = 210926933081280. Its totient is φ = 209296892210560.

The previous prime is 210111022112213. The next prime is 210111022112261. The reversal of 210111022112221 is 122211220111012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 210111022112221 - 2³ = 210111022112213 is a prime.

It is a super-2 number, since 2×210111022112221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210111022112261) 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, 1088725266 + ... + 1088918236.

It is an arithmetic number, because the mean of its divisors is an integer number (13182933317580).

Almost surely, 2^{210111022112221} is an apocalyptic number.

It is an amenable number.

210111022112221 is a deficient number, since it is larger than the sum of its proper divisors (815910969059).

210111022112221 is a wasteful number, since it uses less digits than its factorization.

210111022112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197564.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 210111022112221 its reverse (122211220111012), we get a palindrome (332322242223233).

The spelling of 210111022112221 in words is "two hundred ten trillion, one hundred eleven billion, twenty-two million, one hundred twelve thousand, two hundred twenty-one".