8021131 has 2 divisors, whose sum is σ = 8021132. Its totient is φ = 8021130.

The previous prime is 8021129. The next prime is 8021147. The reversal of 8021131 is 1311208.

It is an a-pointer prime, because the next prime (8021147) can be obtained adding 8021131 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8021131 - 2¹ = 8021129 is a prime.

It is a super-2 number, since 2×8021131² = 128677085038322, which contains 22 as substring.

Together with 8021129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8021171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4010565 + 4010566.

It is an arithmetic number, because the mean of its divisors is an integer number (4010566).

Almost surely, 2^8021131 is an apocalyptic number.

8021131 is a deficient number, since it is larger than the sum of its proper divisors (1).

8021131 is an equidigital number, since it uses as much as digits as its factorization.

8021131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 8021131 is about 2832.1601296537. The cubic root of 8021131 is about 200.1759368524.

Adding to 8021131 its reverse (1311208), we get a palindrome (9332339).

The spelling of 8021131 in words is "eight million, twenty-one thousand, one hundred thirty-one".