210112220100021 has 16 divisors (see below), whose sum is σ = 280820891801280. Its totient is φ = 139739194707840.

The previous prime is 210112220100017. The next prime is 210112220100037. The reversal of 210112220100021 is 120001022211012.

It is not a de Polignac number, because 210112220100021 - 2² = 210112220100017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210112220100071) 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, 60045406 + ... + 63448208.

It is an arithmetic number, because the mean of its divisors is an integer number (17551305737580).

Almost surely, 2^{210112220100021} is an apocalyptic number.

It is an amenable number.

210112220100021 is a deficient number, since it is larger than the sum of its proper divisors (70708671701259).

210112220100021 is a wasteful number, since it uses less digits than its factorization.

210112220100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3452116.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210112220100021 its reverse (120001022211012), we get a palindrome (330113242311033).

The spelling of 210112220100021 in words is "two hundred ten trillion, one hundred twelve billion, two hundred twenty million, one hundred thousand, twenty-one".