1231161214 has 4 divisors (see below), whose sum is σ = 1846741824. Its totient is φ = 615580606.

The previous prime is 1231161209. The next prime is 1231161257. The reversal of 1231161214 is 4121611321.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307790302 + ... + 307790305.

It is an arithmetic number, because the mean of its divisors is an integer number (461685456).

Almost surely, 2^1231161214 is an apocalyptic number.

1231161214 is a deficient number, since it is larger than the sum of its proper divisors (615580610).

1231161214 is an equidigital number, since it uses as much as digits as its factorization.

1231161214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615580609.

The product of its digits is 288, while the sum is 22.

The square root of 1231161214 is about 35087.9069481210. The cubic root of 1231161214 is about 1071.7783377874.

Adding to 1231161214 its reverse (4121611321), we get a palindrome (5352772535).

The spelling of 1231161214 in words is "one billion, two hundred thirty-one million, one hundred sixty-one thousand, two hundred fourteen".