1113400121 has 4 divisors (see below), whose sum is σ = 1131652644. Its totient is φ = 1095147600.

The previous prime is 1113400109. The next prime is 1113400139. The reversal of 1113400121 is 1210043111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96746896 + 1016653225 = 9836^2 + 31885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1113400121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1113400096 and 1113400105.

It is not an unprimeable number, because it can be changed into a prime (1113400621) 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, 9126170 + ... + 9126291.

It is an arithmetic number, because the mean of its divisors is an integer number (282913161).

Almost surely, 2^1113400121 is an apocalyptic number.

It is an amenable number.

1113400121 is a deficient number, since it is larger than the sum of its proper divisors (18252523).

1113400121 is an equidigital number, since it uses as much as digits as its factorization.

1113400121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18252522.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1113400121 is about 33367.6508163221. The cubic root of 1113400121 is about 1036.4549293863.

Adding to 1113400121 its reverse (1210043111), we get a palindrome (2323443232).

The spelling of 1113400121 in words is "one billion, one hundred thirteen million, four hundred thousand, one hundred twenty-one".