221002202213 has 16 divisors (see below), whose sum is σ = 240151198896. Its totient is φ = 202160824320.

The previous prime is 221002202209. The next prime is 221002202219. The reversal of 221002202213 is 312202200122.

It can be written as a sum of positive squares in 8 ways, for example, as 18112314724 + 202889887489 = 134582^2 + 450433^2 .

It is not a de Polignac number, because 221002202213 - 2² = 221002202209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221002202191 and 221002202200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002202219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11861681 + ... + 11880297.

It is an arithmetic number, because the mean of its divisors is an integer number (15009449931).

Almost surely, 2^221002202213 is an apocalyptic number.

It is an amenable number.

221002202213 is a deficient number, since it is larger than the sum of its proper divisors (19148996683).

221002202213 is a wasteful number, since it uses less digits than its factorization.

221002202213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26824.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 221002202213 its reverse (312202200122), we get a palindrome (533204402335).

The spelling of 221002202213 in words is "two hundred twenty-one billion, two million, two hundred two thousand, two hundred thirteen".