210222010021 has 4 divisors (see below), whose sum is σ = 210489128992. Its totient is φ = 209954891052.

The previous prime is 210222009961. The next prime is 210222010069. The reversal of 210222010021 is 120010222012.

It is a happy number.

210222010021 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 not a de Polignac number, because 210222010021 - 2⁹ = 210222009509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210222009983 and 210222010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210222010321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133558305 + ... + 133559878.

It is an arithmetic number, because the mean of its divisors is an integer number (52622282248).

Almost surely, 2^210222010021 is an apocalyptic number.

It is an amenable number.

210222010021 is a deficient number, since it is larger than the sum of its proper divisors (267118971).

210222010021 is an equidigital number, since it uses as much as digits as its factorization.

210222010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267118970.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 210222010021 its reverse (120010222012), we get a palindrome (330232232033).

The spelling of 210222010021 in words is "two hundred ten billion, two hundred twenty-two million, ten thousand, twenty-one".