221213020202 has 4 divisors (see below), whose sum is σ = 331819530306. Its totient is φ = 110606510100.

The previous prime is 221213020151. The next prime is 221213020247. The reversal of 221213020202 is 202020312122.

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

It can be written as a sum of positive squares in only one way, i.e., 213129032281 + 8083987921 = 461659^2 + 89911^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55303255049 + ... + 55303255052.

Almost surely, 2^221213020202 is an apocalyptic number.

221213020202 is a deficient number, since it is larger than the sum of its proper divisors (110606510104).

221213020202 is a wasteful number, since it uses less digits than its factorization.

221213020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110606510103.

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

Adding to 221213020202 its reverse (202020312122), we get a palindrome (423233332324).

The spelling of 221213020202 in words is "two hundred twenty-one billion, two hundred thirteen million, twenty thousand, two hundred two".