201020403131 has 4 divisors (see below), whose sum is σ = 207952141200. Its totient is φ = 194088665064.

The previous prime is 201020403127. The next prime is 201020403139. The reversal of 201020403131 is 131304020102.

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

It is a cyclic number.

It is not a de Polignac number, because 201020403131 - 2² = 201020403127 is a prime.

It is a super-2 number, since 2×201020403131² (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 (201020403139) 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, 3465868991 + ... + 3465869048.

It is an arithmetic number, because the mean of its divisors is an integer number (51988035300).

Almost surely, 2^201020403131 is an apocalyptic number.

201020403131 is a deficient number, since it is larger than the sum of its proper divisors (6931738069).

201020403131 is an equidigital number, since it uses as much as digits as its factorization.

201020403131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6931738068.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 201020403131 its reverse (131304020102), we get a palindrome (332324423233).

The spelling of 201020403131 in words is "two hundred one billion, twenty million, four hundred three thousand, one hundred thirty-one".