1311231332001 has 16 divisors (see below), whose sum is σ = 1789080708096. Its totient is φ = 853770678096.

The previous prime is 1311231331987. The next prime is 1311231332003. The reversal of 1311231332001 is 1002331321131.

It is a happy number.

It is not a de Polignac number, because 1311231332001 - 2¹⁵ = 1311231299233 is a prime.

It is a super-2 number, since 2×1311231332001² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1311231332003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1761676 + ... + 2392898.

It is an arithmetic number, because the mean of its divisors is an integer number (111817544256).

Almost surely, 2^{1311231332001} is an apocalyptic number.

It is an amenable number.

1311231332001 is a deficient number, since it is larger than the sum of its proper divisors (477849376095).

1311231332001 is a wasteful number, since it uses less digits than its factorization.

1311231332001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647372.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1311231332001 its reverse (1002331321131), we get a palindrome (2313562653132).

The spelling of 1311231332001 in words is "one trillion, three hundred eleven billion, two hundred thirty-one million, three hundred thirty-two thousand, one".