210222021021 has 4 divisors (see below), whose sum is σ = 280296028032. Its totient is φ = 140148014012.

The previous prime is 210222021019. The next prime is 210222021067. The reversal of 210222021021 is 120120222012.

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 210222021021 - 2¹ = 210222021019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210222021071) 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, 35037003501 + ... + 35037003506.

It is an arithmetic number, because the mean of its divisors is an integer number (70074007008).

Almost surely, 2^210222021021 is an apocalyptic number.

It is an amenable number.

210222021021 is a deficient number, since it is larger than the sum of its proper divisors (70074007011).

210222021021 is an equidigital number, since it uses as much as digits as its factorization.

210222021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70074007010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 210222021021 its reverse (120120222012), we get a palindrome (330342243033).

The spelling of 210222021021 in words is "two hundred ten billion, two hundred twenty-two million, twenty-one thousand, twenty-one".