210202022210021 has 8 divisors (see below), whose sum is σ = 217474451623800. Its totient is φ = 202931198384320.

The previous prime is 210202022210003. The next prime is 210202022210029. The reversal of 210202022210021 is 120012220202012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 114805096101796 + 95396926108225 = 10714714^2 + 9767135^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210202022210021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210202022210029) 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, 401130650 + ... + 401654331.

It is an arithmetic number, because the mean of its divisors is an integer number (27184306452975).

Almost surely, 2^{210202022210021} is an apocalyptic number.

It is an amenable number.

210202022210021 is a deficient number, since it is larger than the sum of its proper divisors (7272429413779).

210202022210021 is an equidigital number, since it uses as much as digits as its factorization.

210202022210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802794039.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 210202022210021 its reverse (120012220202012), we get a palindrome (330214242412033).

The spelling of 210202022210021 in words is "two hundred ten trillion, two hundred two billion, twenty-two million, two hundred ten thousand, twenty-one".