201020401331 has 2 divisors, whose sum is σ = 201020401332. Its totient is φ = 201020401330.

The previous prime is 201020401321. The next prime is 201020401423. The reversal of 201020401331 is 133104020102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201020401331 - 2²² = 201016207027 is a prime.

It is a super-2 number, since 2×201020401331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201020401321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510200665 + 100510200666.

It is an arithmetic number, because the mean of its divisors is an integer number (100510200666).

Almost surely, 2^201020401331 is an apocalyptic number.

201020401331 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020401331 is an equidigital number, since it uses as much as digits as its factorization.

201020401331 is an evil number, because the sum of its binary digits is even.

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

Adding to 201020401331 its reverse (133104020102), we get a palindrome (334124421433).

The spelling of 201020401331 in words is "two hundred one billion, twenty million, four hundred one thousand, three hundred thirty-one".