2131201001 has 4 divisors (see below), whose sum is σ = 2140118400. Its totient is φ = 2122283604.

The previous prime is 2131200997. The next prime is 2131201081. The reversal of 2131201001 is 1001021312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2131201001 - 2² = 2131200997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131201081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4458341 + ... + 4458818.

It is an arithmetic number, because the mean of its divisors is an integer number (535029600).

Almost surely, 2^2131201001 is an apocalyptic number.

It is an amenable number.

2131201001 is a deficient number, since it is larger than the sum of its proper divisors (8917399).

2131201001 is an equidigital number, since it uses as much as digits as its factorization.

2131201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8917398.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2131201001 is about 46164.9325895750. The cubic root of 2131201001 is about 1286.8901314451.

Adding to 2131201001 its reverse (1001021312), we get a palindrome (3132222313).

The spelling of 2131201001 in words is "two billion, one hundred thirty-one million, two hundred one thousand, one".