221121202 has 32 divisors (see below), whose sum is σ = 362119680. Its totient is φ = 100880640.

The previous prime is 221121181. The next prime is 221121209. The reversal of 221121202 is 202121122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221121209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396708 + ... + 397264.

It is an arithmetic number, because the mean of its divisors is an integer number (11316240).

Almost surely, 2^221121202 is an apocalyptic number.

221121202 is a deficient number, since it is larger than the sum of its proper divisors (140998478).

221121202 is a wasteful number, since it uses less digits than its factorization.

221121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 221121202 is about 14870.1446529615. The cubic root of 221121202 is about 604.7048643581.

Adding to 221121202 its reverse (202121122), we get a palindrome (423242324).

The spelling of 221121202 in words is "two hundred twenty-one million, one hundred twenty-one thousand, two hundred two".