221020202 has 64 divisors (see below), whose sum is σ = 388475136. Its totient is φ = 93519360.

The previous prime is 221020199. The next prime is 221020207. The reversal of 221020202 is 202020122.

It is not an unprimeable number, because it can be changed into a prime (221020207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2662853 + ... + 2662935.

It is an arithmetic number, because the mean of its divisors is an integer number (6069924).

Almost surely, 2^221020202 is an apocalyptic number.

221020202 is a deficient number, since it is larger than the sum of its proper divisors (167454934).

221020202 is a wasteful number, since it uses less digits than its factorization.

221020202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 221020202 is about 14866.7481985806. The cubic root of 221020202 is about 604.6127813857.

Adding to 221020202 its reverse (202020122), we get a palindrome (423040324).

The spelling of 221020202 in words is "two hundred twenty-one million, twenty thousand, two hundred two".