1331201331 has 8 divisors (see below), whose sum is σ = 1972150160. Its totient is φ = 887467536.

The previous prime is 1331201329. The next prime is 1331201357. The reversal of 1331201331 is 1331021331.

It is a happy number.

1331201331 is a `hidden beast` number, since 1 + 331 + 2 + 0 + 1 + 331 = 666.

It is not a de Polignac number, because 1331201331 - 2¹ = 1331201329 is a prime.

It is a super-2 number, since 2×1331201331² = 3544193967312343122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331201831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24651850 + ... + 24651903.

It is an arithmetic number, because the mean of its divisors is an integer number (246518770).

Almost surely, 2^1331201331 is an apocalyptic number.

1331201331 is a deficient number, since it is larger than the sum of its proper divisors (640948829).

1331201331 is an equidigital number, since it uses as much as digits as its factorization.

1331201331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49303762 (or 49303756 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1331201331 is about 36485.6318432339. The cubic root of 1331201331 is about 1100.0554602891.

Adding to 1331201331 its reverse (1331021331), we get a palindrome (2662222662).

The spelling of 1331201331 in words is "one billion, three hundred thirty-one million, two hundred one thousand, three hundred thirty-one".