1331201001 has 12 divisors (see below), whose sum is σ = 1921971408. Its totient is φ = 819200304.

The previous prime is 1331200999. The next prime is 1331201021. The reversal of 1331201001 is 1001021331.

1331201001 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1331201001 - 2¹ = 1331200999 is a prime.

It is a super-2 number, since 2×1331201001² = 3544192210126804002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1331201021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1312315 + ... + 1313328.

It is an arithmetic number, because the mean of its divisors is an integer number (160164284).

Almost surely, 2^1331201001 is an apocalyptic number.

It is an amenable number.

1331201001 is a deficient number, since it is larger than the sum of its proper divisors (590770407).

1331201001 is a wasteful number, since it uses less digits than its factorization.

1331201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625672 (or 2625659 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1331201001 is about 36485.6273209054. The cubic root of 1331201001 is about 1100.0553693892.

Adding to 1331201001 its reverse (1001021331), we get a palindrome (2332222332).

The spelling of 1331201001 in words is "one billion, three hundred thirty-one million, two hundred one thousand, one".