1020201331571 has 2 divisors, whose sum is σ = 1020201331572. Its totient is φ = 1020201331570.

The previous prime is 1020201331547. The next prime is 1020201331579. The reversal of 1020201331571 is 1751331020201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020201331571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020201331571.

It is not a weakly prime, because it can be changed into another prime (1020201331579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510100665785 + 510100665786.

It is an arithmetic number, because the mean of its divisors is an integer number (510100665786).

Almost surely, 2^{1020201331571} is an apocalyptic number.

1020201331571 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020201331571 is an equidigital number, since it uses as much as digits as its factorization.

1020201331571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 26.

Adding to 1020201331571 its reverse (1751331020201), we get a palindrome (2771532351772).

The spelling of 1020201331571 in words is "one trillion, twenty billion, two hundred one million, three hundred thirty-one thousand, five hundred seventy-one".