210830690221 has 4 divisors (see below), whose sum is σ = 210833107452. Its totient is φ = 210828272992.

The previous prime is 210830690209. The next prime is 210830690233. The reversal of 210830690221 is 122096038012.

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

It is an interprime number because it is at equal distance from previous prime (210830690209) and next prime (210830690233).

It can be written as a sum of positive squares in 2 ways, for example, as 196576956900 + 14253733321 = 443370^2 + 119389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210830690221 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 (210830690621) 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, 1072690 + ... + 1253923.

It is an arithmetic number, because the mean of its divisors is an integer number (52708276863).

Almost surely, 2^210830690221 is an apocalyptic number.

It is an amenable number.

210830690221 is a deficient number, since it is larger than the sum of its proper divisors (2417231).

210830690221 is an equidigital number, since it uses as much as digits as its factorization.

210830690221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2417230.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 210830690221 in words is "two hundred ten billion, eight hundred thirty million, six hundred ninety thousand, two hundred twenty-one".