1031120231 has 2 divisors, whose sum is σ = 1031120232. Its totient is φ = 1031120230.

The previous prime is 1031120219. The next prime is 1031120267. The reversal of 1031120231 is 1320211301.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031120231 is a prime.

It is a super-2 number, since 2×1031120231² = 2126417861554986722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031120281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515560115 + 515560116.

It is an arithmetic number, because the mean of its divisors is an integer number (515560116).

Almost surely, 2^1031120231 is an apocalyptic number.

1031120231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031120231 is an equidigital number, since it uses as much as digits as its factorization.

1031120231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1031120231 is about 32111.0608825059. The cubic root of 1031120231 is about 1010.2676253838.

Adding to 1031120231 its reverse (1320211301), we get a palindrome (2351331532).

The spelling of 1031120231 in words is "one billion, thirty-one million, one hundred twenty thousand, two hundred thirty-one".