1111210993 has 4 divisors (see below), whose sum is σ = 1111315108. Its totient is φ = 1111106880.

The previous prime is 1111210979. The next prime is 1111210999. The reversal of 1111210993 is 3990121111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3990121111 = 6101 ⋅654011.

It can be written as a sum of positive squares in 2 ways, for example, as 261371889 + 849839104 = 16167^2 + 29152^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111210993 - 2⁹ = 1111210481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111210999) 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, 33948 + ... + 58093.

It is an arithmetic number, because the mean of its divisors is an integer number (277828777).

Almost surely, 2^1111210993 is an apocalyptic number.

It is an amenable number.

1111210993 is a deficient number, since it is larger than the sum of its proper divisors (104115).

1111210993 is an equidigital number, since it uses as much as digits as its factorization.

1111210993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104114.

The product of its (nonzero) digits is 486, while the sum is 28.

The square root of 1111210993 is about 33334.8315279979. The cubic root of 1111210993 is about 1035.7752033466.

The spelling of 1111210993 in words is "one billion, one hundred eleven million, two hundred ten thousand, nine hundred ninety-three".