210202210022221 has 4 divisors (see below), whose sum is σ = 210825955452892. Its totient is φ = 209578464591552.

The previous prime is 210202210022093. The next prime is 210202210022263. The reversal of 210202210022221 is 122220012202012.

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 97591677322500 + 112610532699721 = 9878850^2 + 10611811^2 .

It is a cyclic number.

It is not a de Polignac number, because 210202210022221 - 2⁷ = 210202210022093 is a prime.

It is a super-3 number, since 3×210202210022221³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210202210025221) 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, 311872714830 + ... + 311872715503.

It is an arithmetic number, because the mean of its divisors is an integer number (52706488863223).

Almost surely, 2^{210202210022221} is an apocalyptic number.

It is an amenable number.

210202210022221 is a deficient number, since it is larger than the sum of its proper divisors (623745430671).

210202210022221 is an equidigital number, since it uses as much as digits as its factorization.

210202210022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623745430670.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 210202210022221 its reverse (122220012202012), we get a palindrome (332422222224233).

The spelling of 210202210022221 in words is "two hundred ten trillion, two hundred two billion, two hundred ten million, twenty-two thousand, two hundred twenty-one".