201031312001 has 4 divisors (see below), whose sum is σ = 216495259092. Its totient is φ = 185567364912.

The previous prime is 201031311991. The next prime is 201031312037. The reversal of 201031312001 is 100213130102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51590308225 + 149441003776 = 227135^2 + 386576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201031312001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201031312081) 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, 7731973526 + ... + 7731973551.

It is an arithmetic number, because the mean of its divisors is an integer number (54123814773).

Almost surely, 2^201031312001 is an apocalyptic number.

It is an amenable number.

201031312001 is a deficient number, since it is larger than the sum of its proper divisors (15463947091).

201031312001 is a wasteful number, since it uses less digits than its factorization.

201031312001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15463947090.

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

Adding to 201031312001 its reverse (100213130102), we get a palindrome (301244442103).

The spelling of 201031312001 in words is "two hundred one billion, thirty-one million, three hundred twelve thousand, one".