1301331331 has 4 divisors (see below), whose sum is σ = 1301937912. Its totient is φ = 1300724752.

The previous prime is 1301331263. The next prime is 1301331341. The reversal of 1301331331 is 1331331031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1331331031 = 4339 ⋅306829.

It is a cyclic number.

It is not a de Polignac number, because 1301331331 - 2⁹ = 1301330819 is a prime.

It is a super-2 number, since 2×1301331331² = 3386926466084463122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1301331299 and 1301331308.

It is not an unprimeable number, because it can be changed into a prime (1301331341) 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, 300061 + ... + 304366.

It is an arithmetic number, because the mean of its divisors is an integer number (325484478).

Almost surely, 2^1301331331 is an apocalyptic number.

1301331331 is a deficient number, since it is larger than the sum of its proper divisors (606581).

1301331331 is an equidigital number, since it uses as much as digits as its factorization.

1301331331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606580.

The product of its (nonzero) digits is 243, while the sum is 19.

The square root of 1301331331 is about 36073.9702694339. The cubic root of 1301331331 is about 1091.7653213823.

Adding to 1301331331 its reverse (1331331031), we get a palindrome (2632662362).

It can be divided in two parts, 13013 and 31331, that added together give a palindrome (44344).

The spelling of 1301331331 in words is "one billion, three hundred one million, three hundred thirty-one thousand, three hundred thirty-one".