1115212031 has 2 divisors, whose sum is σ = 1115212032. Its totient is φ = 1115212030.

The previous prime is 1115211997. The next prime is 1115212037. The reversal of 1115212031 is 1302125111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1115212031 - 2⁶ = 1115211967 is a prime.

It is a super-3 number, since 3×1115212031³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115212037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557606015 + 557606016.

It is an arithmetic number, because the mean of its divisors is an integer number (557606016).

Almost surely, 2^1115212031 is an apocalyptic number.

1115212031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115212031 is an equidigital number, since it uses as much as digits as its factorization.

1115212031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 1115212031 is about 33394.7904769591. The cubic root of 1115212031 is about 1037.0168553356.

Adding to 1115212031 its reverse (1302125111), we get a palindrome (2417337142).

The spelling of 1115212031 in words is "one billion, one hundred fifteen million, two hundred twelve thousand, thirty-one".