21111146341 has 2 divisors, whose sum is σ = 21111146342. Its totient is φ = 21111146340.

The previous prime is 21111146317. The next prime is 21111146347. The reversal of 21111146341 is 14364111112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14903282241 + 6207864100 = 122079^2 + 78790^2 .

It is a cyclic number.

It is not a de Polignac number, because 21111146341 - 2⁷ = 21111146213 is a prime.

It is a super-2 number, since 2×21111146341² (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 (21111146347) 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 as a sum of consecutive naturals, namely, 10555573170 + 10555573171.

It is an arithmetic number, because the mean of its divisors is an integer number (10555573171).

Almost surely, 2^21111146341 is an apocalyptic number.

It is an amenable number.

21111146341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111146341 is an equidigital number, since it uses as much as digits as its factorization.

21111146341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 25.

Adding to 21111146341 its reverse (14364111112), we get a palindrome (35475257453).

The spelling of 21111146341 in words is "twenty-one billion, one hundred eleven million, one hundred forty-six thousand, three hundred forty-one".