1320001031 has 4 divisors (see below), whose sum is σ = 1320717552. Its totient is φ = 1319284512.

The previous prime is 1320001013. The next prime is 1320001037. The reversal of 1320001031 is 1301000231.

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

It is a cyclic number.

It is not a de Polignac number, because 1320001031 - 2¹⁴ = 1319984647 is a prime.

It is a super-2 number, since 2×1320001031² = 3484805443682125922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320001037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355490 + ... + 359183.

It is an arithmetic number, because the mean of its divisors is an integer number (330179388).

Almost surely, 2^1320001031 is an apocalyptic number.

1320001031 is a deficient number, since it is larger than the sum of its proper divisors (716521).

1320001031 is an equidigital number, since it uses as much as digits as its factorization.

1320001031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716520.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1320001031 is about 36331.8184378377. The cubic root of 1320001031 is about 1096.9615960842.

Adding to 1320001031 its reverse (1301000231), we get a palindrome (2621001262).

The spelling of 1320001031 in words is "one billion, three hundred twenty million, one thousand, thirty-one".