1020201331 has 4 divisors (see below), whose sum is σ = 1080213192. Its totient is φ = 960189472.

The previous prime is 1020201311. The next prime is 1020201341. The reversal of 1020201331 is 1331020201.

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 1020201331 - 2²⁷ = 885983603 is a prime.

It is a super-2 number, since 2×1020201331² = 2081621511548343122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020201311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30005905 + ... + 30005938.

It is an arithmetic number, because the mean of its divisors is an integer number (270053298).

Almost surely, 2^1020201331 is an apocalyptic number.

1020201331 is a deficient number, since it is larger than the sum of its proper divisors (60011861).

1020201331 is an equidigital number, since it uses as much as digits as its factorization.

1020201331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60011860.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1020201331 is about 31940.5906488906. The cubic root of 1020201331 is about 1006.6889353850.

Adding to 1020201331 its reverse (1331020201), we get a palindrome (2351221532).

The spelling of 1020201331 in words is "one billion, twenty million, two hundred one thousand, three hundred thirty-one".