102001012331 has 4 divisors (see below), whose sum is σ = 102006166392. Its totient is φ = 101995858272.

The previous prime is 102001012319. The next prime is 102001012357. The reversal of 102001012331 is 133210100201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102001012331 is a prime.

It is a super-2 number, since 2×102001012331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102001012301) 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, 2547230 + ... + 2586963.

It is an arithmetic number, because the mean of its divisors is an integer number (25501541598).

Almost surely, 2^102001012331 is an apocalyptic number.

102001012331 is a deficient number, since it is larger than the sum of its proper divisors (5154061).

102001012331 is an equidigital number, since it uses as much as digits as its factorization.

102001012331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5154060.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 102001012331 its reverse (133210100201), we get a palindrome (235211112532).

The spelling of 102001012331 in words is "one hundred two billion, one million, twelve thousand, three hundred thirty-one".