1312211115 has 12 divisors (see below), whose sum is σ = 2274499344. Its totient is φ = 699845904.

The previous prime is 1312211101. The next prime is 1312211123. The reversal of 1312211115 is 5111122131.

It is not a de Polignac number, because 1312211115 - 2⁶ = 1312211051 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14580079 + ... + 14580168.

It is an arithmetic number, because the mean of its divisors is an integer number (189541612).

Almost surely, 2^1312211115 is an apocalyptic number.

1312211115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1312211115 is a deficient number, since it is larger than the sum of its proper divisors (962288229).

1312211115 is a wasteful number, since it uses less digits than its factorization.

1312211115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29160258 (or 29160255 counting only the distinct ones).

The product of its digits is 60, while the sum is 18.

The square root of 1312211115 is about 36224.4546542802. The cubic root of 1312211115 is about 1094.7994503548.

Adding to 1312211115 its reverse (5111122131), we get a palindrome (6423333246).

The spelling of 1312211115 in words is "one billion, three hundred twelve million, two hundred eleven thousand, one hundred fifteen".