841821131 has 2 divisors, whose sum is σ = 841821132. Its totient is φ = 841821130.

The previous prime is 841821107. The next prime is 841821133. The reversal of 841821131 is 131128148.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 841821131 - 2¹⁸ = 841558987 is a prime.

It is a super-2 number, since 2×841821131² = 1417325633196238322, which contains 22 as substring.

Together with 841821133, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 841821094 and 841821103.

It is not a weakly prime, because it can be changed into another prime (841821133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420910565 + 420910566.

It is an arithmetic number, because the mean of its divisors is an integer number (420910566).

Almost surely, 2^841821131 is an apocalyptic number.

841821131 is a deficient number, since it is larger than the sum of its proper divisors (1).

841821131 is an equidigital number, since it uses as much as digits as its factorization.

841821131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 29.

The square root of 841821131 is about 29014.1539769816. The cubic root of 841821131 is about 944.2201720448.

Adding to 841821131 its reverse (131128148), we get a palindrome (972949279).

The spelling of 841821131 in words is "eight hundred forty-one million, eight hundred twenty-one thousand, one hundred thirty-one".