21411011231 has 2 divisors, whose sum is σ = 21411011232. Its totient is φ = 21411011230.

The previous prime is 21411011203. The next prime is 21411011287. The reversal of 21411011231 is 13211011412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21411011231 - 2²² = 21406816927 is a prime.

It is a super-2 number, since 2×21411011231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21411011291) 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, 10705505615 + 10705505616.

It is an arithmetic number, because the mean of its divisors is an integer number (10705505616).

Almost surely, 2^21411011231 is an apocalyptic number.

21411011231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21411011231 is an equidigital number, since it uses as much as digits as its factorization.

21411011231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21411011231 its reverse (13211011412), we get a palindrome (34622022643).

The spelling of 21411011231 in words is "twenty-one billion, four hundred eleven million, eleven thousand, two hundred thirty-one".