21116144053 has 2 divisors, whose sum is σ = 21116144054. Its totient is φ = 21116144052.

The previous prime is 21116144029. The next prime is 21116144069. The reversal of 21116144053 is 35044161112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16853751684 + 4262392369 = 129822^2 + 65287^2 .

It is a cyclic number.

It is not a de Polignac number, because 21116144053 - 2⁹ = 21116143541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21116144453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10558072026 + 10558072027.

It is an arithmetic number, because the mean of its divisors is an integer number (10558072027).

Almost surely, 2^21116144053 is an apocalyptic number.

It is an amenable number.

21116144053 is a deficient number, since it is larger than the sum of its proper divisors (1).

21116144053 is an equidigital number, since it uses as much as digits as its factorization.

21116144053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 21116144053 in words is "twenty-one billion, one hundred sixteen million, one hundred forty-four thousand, fifty-three".