1231031122 has 4 divisors (see below), whose sum is σ = 1846546686. Its totient is φ = 615515560.

The previous prime is 1231031089. The next prime is 1231031141. The reversal of 1231031122 is 2211301321.

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

It can be written as a sum of positive squares in only one way, i.e., 775678201 + 455352921 = 27851^2 + 21339^2 .

It is a super-3 number, since 3×1231031122³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231031096 and 1231031105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307757779 + ... + 307757782.

Almost surely, 2^1231031122 is an apocalyptic number.

1231031122 is a deficient number, since it is larger than the sum of its proper divisors (615515564).

1231031122 is an equidigital number, since it uses as much as digits as its factorization.

1231031122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615515563.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1231031122 is about 35086.0530980616. The cubic root of 1231031122 is about 1071.7405862465.

Adding to 1231031122 its reverse (2211301321), we get a palindrome (3442332443).

The spelling of 1231031122 in words is "one billion, two hundred thirty-one million, thirty-one thousand, one hundred twenty-two".