221231122 has 16 divisors (see below), whose sum is σ = 379716480. Its totient is φ = 94697568.

The previous prime is 221231077. The next prime is 221231137. The reversal of 221231122 is 221132122.

It is a happy number.

221231122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221231096 and 221231105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2779 + ... + 21217.

It is an arithmetic number, because the mean of its divisors is an integer number (23732280).

Almost surely, 2^221231122 is an apocalyptic number.

221231122 is a deficient number, since it is larger than the sum of its proper divisors (158485358).

221231122 is a wasteful number, since it uses less digits than its factorization.

221231122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19305.

The product of its digits is 96, while the sum is 16.

The square root of 221231122 is about 14873.8401900787. The cubic root of 221231122 is about 604.8050479484.

Adding to 221231122 its reverse (221132122), we get a palindrome (442363244).

The spelling of 221231122 in words is "two hundred twenty-one million, two hundred thirty-one thousand, one hundred twenty-two".