1212331113 has 24 divisors (see below), whose sum is σ = 2043894528. Its totient is φ = 678019392.

The previous prime is 1212331093. The next prime is 1212331129. The reversal of 1212331113 is 3111332121.

It is a de Polignac number, because none of the positive numbers 2^k-1212331113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212331193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201756 + ... + 207677.

It is an arithmetic number, because the mean of its divisors is an integer number (85162272).

Almost surely, 2^1212331113 is an apocalyptic number.

It is an amenable number.

1212331113 is a deficient number, since it is larger than the sum of its proper divisors (831563415).

1212331113 is a wasteful number, since it uses less digits than its factorization.

1212331113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409493 (or 409490 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1212331113 is about 34818.5455325176. The cubic root of 1212331113 is about 1066.2861061143.

Adding to 1212331113 its reverse (3111332121), we get a palindrome (4323663234).

The spelling of 1212331113 in words is "one billion, two hundred twelve million, three hundred thirty-one thousand, one hundred thirteen".