1111212113 has 4 divisors (see below), whose sum is σ = 1212231408. Its totient is φ = 1010192820.

The previous prime is 1111212107. The next prime is 1111212119. The reversal of 1111212113 is 3112121111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1111212107) and next prime (1111212119).

It is a cyclic number.

It is not a de Polignac number, because 1111212113 - 2²⁴ = 1094434897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111212119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50509631 + ... + 50509652.

It is an arithmetic number, because the mean of its divisors is an integer number (303057852).

Almost surely, 2^1111212113 is an apocalyptic number.

It is an amenable number.

1111212113 is a deficient number, since it is larger than the sum of its proper divisors (101019295).

1111212113 is a wasteful number, since it uses less digits than its factorization.

1111212113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101019294.

The product of its digits is 12, while the sum is 14.

The square root of 1111212113 is about 33334.8483272386. The cubic root of 1111212113 is about 1035.7755513356.

Adding to 1111212113 its reverse (3112121111), we get a palindrome (4223333224).

The spelling of 1111212113 in words is "one billion, one hundred eleven million, two hundred twelve thousand, one hundred thirteen".