1321113042 has 12 divisors (see below), whose sum is σ = 2862411630. Its totient is φ = 440371008.

The previous prime is 1321112953. The next prime is 1321113049. The reversal of 1321113042 is 2403111231.

It can be written as a sum of positive squares in only one way, i.e., 1317036681 + 4076361 = 36291^2 + 2019^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 73395169 = 1321113042 / (1 + 3 + 2 + 1 + 1 + 1 + 3 + 0 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (1321113049) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36697567 + ... + 36697602.

Almost surely, 2^1321113042 is an apocalyptic number.

1321113042 is an abundant number, since it is smaller than the sum of its proper divisors (1541298588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321113042 is a wasteful number, since it uses less digits than its factorization.

1321113042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73395177 (or 73395174 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1321113042 is about 36347.1187578878. The cubic root of 1321113042 is about 1097.2695481112.

Adding to 1321113042 its reverse (2403111231), we get a palindrome (3724224273).

The spelling of 1321113042 in words is "one billion, three hundred twenty-one million, one hundred thirteen thousand, forty-two".