210000221020221 has 4 divisors (see below), whose sum is σ = 280000294693632. Its totient is φ = 140000147346812.

The previous prime is 210000221020217. The next prime is 210000221020231. The reversal of 210000221020221 is 122020122000012.

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 210000221020221 - 2² = 210000221020217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210000221020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210000221020231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35000036836701 + ... + 35000036836706.

It is an arithmetic number, because the mean of its divisors is an integer number (70000073673408).

Almost surely, 2^{210000221020221} is an apocalyptic number.

It is an amenable number.

210000221020221 is a deficient number, since it is larger than the sum of its proper divisors (70000073673411).

210000221020221 is an equidigital number, since it uses as much as digits as its factorization.

210000221020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70000073673410.

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

Adding to 210000221020221 its reverse (122020122000012), we get a palindrome (332020343020233).

The spelling of 210000221020221 in words is "two hundred ten trillion, two hundred twenty-one million, twenty thousand, two hundred twenty-one".