201001132331 has 4 divisors (see below), whose sum is σ = 201003100464. Its totient is φ = 200999164200.

The previous prime is 201001132279. The next prime is 201001132351. The reversal of 201001132331 is 133231100102.

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-201001132331 is a prime.

It is a super-2 number, since 2×201001132331² (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 (201001132351) 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, 821975 + ... + 1038096.

It is an arithmetic number, because the mean of its divisors is an integer number (50250775116).

Almost surely, 2^201001132331 is an apocalyptic number.

201001132331 is a deficient number, since it is larger than the sum of its proper divisors (1968133).

201001132331 is a wasteful number, since it uses less digits than its factorization.

201001132331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968132.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 201001132331 its reverse (133231100102), we get a palindrome (334232232433).

The spelling of 201001132331 in words is "two hundred one billion, one million, one hundred thirty-two thousand, three hundred thirty-one".