221331122 has 4 divisors (see below), whose sum is σ = 331996686. Its totient is φ = 110665560.

The previous prime is 221331107. The next prime is 221331137. The reversal of 221331122 is 221133122.

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

It is an interprime number because it is at equal distance from previous prime (221331107) and next prime (221331137).

It can be written as a sum of positive squares in only one way, i.e., 150283081 + 71048041 = 12259^2 + 8429^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221331122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55332779 + ... + 55332782.

Almost surely, 2^221331122 is an apocalyptic number.

221331122 is a deficient number, since it is larger than the sum of its proper divisors (110665564).

221331122 is a wasteful number, since it uses less digits than its factorization.

221331122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110665563.

The product of its digits is 144, while the sum is 17.

The square root of 221331122 is about 14877.2014169332. The cubic root of 221331122 is about 604.8961614015.

Adding to 221331122 its reverse (221133122), we get a palindrome (442464244).

The spelling of 221331122 in words is "two hundred twenty-one million, three hundred thirty-one thousand, one hundred twenty-two".