1121312013 has 4 divisors (see below), whose sum is σ = 1495082688. Its totient is φ = 747541340.

The previous prime is 1121312009. The next prime is 1121312021. The reversal of 1121312013 is 3102131211.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 1121312013 - 2² = 1121312009 is a prime.

It is a super-2 number, since 2×1121312013² = 2514681260996224338, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1121311983 and 1121312001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121312033) 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, 186885333 + ... + 186885338.

It is an arithmetic number, because the mean of its divisors is an integer number (373770672).

Almost surely, 2^1121312013 is an apocalyptic number.

It is an amenable number.

1121312013 is a deficient number, since it is larger than the sum of its proper divisors (373770675).

1121312013 is an equidigital number, since it uses as much as digits as its factorization.

1121312013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373770674.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1121312013 is about 33485.9972675147. The cubic root of 1121312013 is about 1038.9041752096.

Adding to 1121312013 its reverse (3102131211), we get a palindrome (4223443224).

The spelling of 1121312013 in words is "one billion, one hundred twenty-one million, three hundred twelve thousand, thirteen".