1112131421 has 4 divisors (see below), whose sum is σ = 1127366172. Its totient is φ = 1096896672.

The previous prime is 1112131399. The next prime is 1112131429. The reversal of 1112131421 is 1241312111.

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 415752100 + 696379321 = 20390^2 + 26389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1112131421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1112131421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112131429) 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, 7617266 + ... + 7617411.

It is an arithmetic number, because the mean of its divisors is an integer number (281841543).

Almost surely, 2^1112131421 is an apocalyptic number.

It is an amenable number.

1112131421 is a deficient number, since it is larger than the sum of its proper divisors (15234751).

1112131421 is an equidigital number, since it uses as much as digits as its factorization.

1112131421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15234750.

The product of its digits is 48, while the sum is 17.

The square root of 1112131421 is about 33348.6344697950. The cubic root of 1112131421 is about 1036.0611056642.

Adding to 1112131421 its reverse (1241312111), we get a palindrome (2353443532).

The spelling of 1112131421 in words is "one billion, one hundred twelve million, one hundred thirty-one thousand, four hundred twenty-one".