21652416454111 has 2 divisors, whose sum is σ = 21652416454112. Its totient is φ = 21652416454110.

The previous prime is 21652416454021. The next prime is 21652416454243. The reversal of 21652416454111 is 11145461425612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21652416454111 - 2³⁹ = 21102660640223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21652416454411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10826208227055 + 10826208227056.

It is an arithmetic number, because the mean of its divisors is an integer number (10826208227056).

Almost surely, 2^{21652416454111} is an apocalyptic number.

21652416454111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21652416454111 is an equidigital number, since it uses as much as digits as its factorization.

21652416454111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 230400, while the sum is 43.

Adding to 21652416454111 its reverse (11145461425612), we get a palindrome (32797877879723).

The spelling of 21652416454111 in words is "twenty-one trillion, six hundred fifty-two billion, four hundred sixteen million, four hundred fifty-four thousand, one hundred eleven".