1331201013 has 4 divisors (see below), whose sum is σ = 1774934688. Its totient is φ = 887467340.

The previous prime is 1331200999. The next prime is 1331201021. The reversal of 1331201013 is 3101021331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1331201013 - 2²⁹ = 794330101 is a prime.

It is a super-2 number, since 2×1331201013² = 3544192274024452338, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1331200983 and 1331201001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331201023) 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, 221866833 + ... + 221866838.

It is an arithmetic number, because the mean of its divisors is an integer number (443733672).

Almost surely, 2^1331201013 is an apocalyptic number.

It is an amenable number.

1331201013 is a deficient number, since it is larger than the sum of its proper divisors (443733675).

1331201013 is an equidigital number, since it uses as much as digits as its factorization.

1331201013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443733674.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1331201013 is about 36485.6274853537. The cubic root of 1331201013 is about 1100.0553726947.

Adding to 1331201013 its reverse (3101021331), we get a palindrome (4432222344).

The spelling of 1331201013 in words is "one billion, three hundred thirty-one million, two hundred one thousand, thirteen".