1320012031 has 4 divisors (see below), whose sum is σ = 1421551432. Its totient is φ = 1218472632.

The previous prime is 1320012019. The next prime is 1320012041. The reversal of 1320012031 is 1302100231.

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

It is not a de Polignac number, because 1320012031 - 2²⁷ = 1185794303 is a prime.

It is a super-2 number, since 2×1320012031² = 3484863523969489922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 101539387 = 1320012031 / (1 + 3 + 2 + 0 + 0 + 1 + 2 + 0 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320012041) 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, 50769681 + ... + 50769706.

It is an arithmetic number, because the mean of its divisors is an integer number (355387858).

Almost surely, 2^1320012031 is an apocalyptic number.

1320012031 is a deficient number, since it is larger than the sum of its proper divisors (101539401).

1320012031 is a wasteful number, since it uses less digits than its factorization.

1320012031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101539400.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1320012031 is about 36331.9698199809. The cubic root of 1320012031 is about 1096.9646431889.

Adding to 1320012031 its reverse (1302100231), we get a palindrome (2622112262).

The spelling of 1320012031 in words is "one billion, three hundred twenty million, twelve thousand, thirty-one".