1111313121 has 8 divisors (see below), whose sum is σ = 1503866784. Its totient is φ = 729817440.

The previous prime is 1111313117. The next prime is 1111313143. The reversal of 1111313121 is 1213131111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1111313121 - 2² = 1111313117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1111313121.

It is not an unprimeable number, because it can be changed into a prime (1111313101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2764260 + ... + 2764661.

It is an arithmetic number, because the mean of its divisors is an integer number (187983348).

Almost surely, 2^1111313121 is an apocalyptic number.

It is an amenable number.

1111313121 is a deficient number, since it is larger than the sum of its proper divisors (392553663).

1111313121 is an equidigital number, since it uses as much as digits as its factorization.

1111313121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5528991.

The product of its digits is 18, while the sum is 15.

The square root of 1111313121 is about 33336.3633439522. The cubic root of 1111313121 is about 1035.8069340170.

Adding to 1111313121 its reverse (1213131111), we get a palindrome (2324444232).

The spelling of 1111313121 in words is "one billion, one hundred eleven million, three hundred thirteen thousand, one hundred twenty-one".