21050441231 has 2 divisors, whose sum is σ = 21050441232. Its totient is φ = 21050441230.

The previous prime is 21050441227. The next prime is 21050441249. The reversal of 21050441231 is 13214405012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21050441231 - 2² = 21050441227 is a prime.

It is a super-2 number, since 2×21050441231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21050441197 and 21050441206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21050441281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10525220615 + 10525220616.

It is an arithmetic number, because the mean of its divisors is an integer number (10525220616).

Almost surely, 2^21050441231 is an apocalyptic number.

21050441231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21050441231 is an equidigital number, since it uses as much as digits as its factorization.

21050441231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 21050441231 its reverse (13214405012), we get a palindrome (34264846243).

The spelling of 21050441231 in words is "twenty-one billion, fifty million, four hundred forty-one thousand, two hundred thirty-one".