210112222021 has 8 divisors (see below), whose sum is σ = 226389413880. Its totient is φ = 193851417792.

The previous prime is 210112221989. The next prime is 210112222043. The reversal of 210112222021 is 120222211012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27175522500 + 182936699521 = 164850^2 + 427711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210112222021 - 2⁵ = 210112221989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210112221986 and 210112222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210112228021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4070266 + ... + 4121563.

It is an arithmetic number, because the mean of its divisors is an integer number (28298676735).

Almost surely, 2^210112222021 is an apocalyptic number.

It is an amenable number.

210112222021 is a deficient number, since it is larger than the sum of its proper divisors (16277191859).

210112222021 is a wasteful number, since it uses less digits than its factorization.

210112222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8193815.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210112222021 its reverse (120222211012), we get a palindrome (330334433033).

The spelling of 210112222021 in words is "two hundred ten billion, one hundred twelve million, two hundred twenty-two thousand, twenty-one".