1002311221331 has 4 divisors (see below), whose sum is σ = 1145498538672. Its totient is φ = 859123903992.

The previous prime is 1002311221259. The next prime is 1002311221343. The reversal of 1002311221331 is 1331221132001.

It is a happy number.

1002311221331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1002311221331 - 2²² = 1002307027027 is a prime.

It is a super-2 number, since 2×1002311221331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002311221531) 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, 71593658660 + ... + 71593658673.

It is an arithmetic number, because the mean of its divisors is an integer number (286374634668).

Almost surely, 2^{1002311221331} is an apocalyptic number.

1002311221331 is a deficient number, since it is larger than the sum of its proper divisors (143187317341).

1002311221331 is an equidigital number, since it uses as much as digits as its factorization.

1002311221331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143187317340.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1002311221331 its reverse (1331221132001), we get a palindrome (2333532353332).

The spelling of 1002311221331 in words is "one trillion, two billion, three hundred eleven million, two hundred twenty-one thousand, three hundred thirty-one".