210022202002021 has 4 divisors (see below), whose sum is σ = 210489957463500. Its totient is φ = 209554446540544.

The previous prime is 210022202001967. The next prime is 210022202002051. The reversal of 210022202002021 is 120200202220012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 150365718016900 + 59656483985121 = 12262370^2 + 7723761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210022202002021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210022202001986 and 210022202002004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210022202002051) 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, 233877730066 + ... + 233877730963.

It is an arithmetic number, because the mean of its divisors is an integer number (52622489365875).

Almost surely, 2^{210022202002021} is an apocalyptic number.

It is an amenable number.

210022202002021 is a deficient number, since it is larger than the sum of its proper divisors (467755461479).

210022202002021 is an equidigital number, since it uses as much as digits as its factorization.

210022202002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467755461478.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 210022202002021 its reverse (120200202220012), we get a palindrome (330222404222033).

The spelling of 210022202002021 in words is "two hundred ten trillion, twenty-two billion, two hundred two million, two thousand, twenty-one".