221031122 has 16 divisors (see below), whose sum is σ = 357302232. Its totient is φ = 101942400.

The previous prime is 221031119. The next prime is 221031143. The reversal of 221031122 is 221130122.

It is a happy number.

221031122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 139688761 + 81342361 = 11819^2 + 9019^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221031097 and 221031106.

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, 57872 + ... + 61572.

Almost surely, 2^221031122 is an apocalyptic number.

221031122 is a deficient number, since it is larger than the sum of its proper divisors (136271110).

221031122 is a wasteful number, since it uses less digits than its factorization.

221031122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6013.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 221031122 is about 14867.1154566042. The cubic root of 221031122 is about 604.6227386397.

Adding to 221031122 its reverse (221130122), we get a palindrome (442161244).

The spelling of 221031122 in words is "two hundred twenty-one million, thirty-one thousand, one hundred twenty-two".