102001331 has 4 divisors (see below), whose sum is σ = 102022032. Its totient is φ = 101980632.

The previous prime is 102001313. The next prime is 102001349. The reversal of 102001331 is 133100201.

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

It is an interprime number because it is at equal distance from previous prime (102001313) and next prime (102001349).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102001331 is a prime.

It is a super-2 number, since 2×102001331² = 20808543051543122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102001391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1781 + ... + 14393.

It is an arithmetic number, because the mean of its divisors is an integer number (25505508).

Almost surely, 2^102001331 is an apocalyptic number.

102001331 is a deficient number, since it is larger than the sum of its proper divisors (20701).

102001331 is an equidigital number, since it uses as much as digits as its factorization.

102001331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20700.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 102001331 is about 10099.5708324661. The cubic root of 102001331 is about 467.2349051370.

Adding to 102001331 its reverse (133100201), we get a palindrome (235101532).

The spelling of 102001331 in words is "one hundred two million, one thousand, three hundred thirty-one".