201330312131 has 4 divisors (see below), whose sum is σ = 216817259232. Its totient is φ = 185843365032.

The previous prime is 201330312121. The next prime is 201330312149. The reversal of 201330312131 is 131213033102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131213033102 = 2 ⋅65606516551.

It is not a de Polignac number, because 201330312131 - 2³⁰ = 200256570307 is a prime.

It is a super-2 number, since 2×201330312131² (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 (201330312121) 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, 7743473531 + ... + 7743473556.

It is an arithmetic number, because the mean of its divisors is an integer number (54204314808).

Almost surely, 2^201330312131 is an apocalyptic number.

201330312131 is a deficient number, since it is larger than the sum of its proper divisors (15486947101).

201330312131 is a wasteful number, since it uses less digits than its factorization.

201330312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15486947100.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 201330312131 its reverse (131213033102), we get a palindrome (332543345233).

The spelling of 201330312131 in words is "two hundred one billion, three hundred thirty million, three hundred twelve thousand, one hundred thirty-one".