21110292823 has 2 divisors, whose sum is σ = 21110292824. Its totient is φ = 21110292822.

The previous prime is 21110292773. The next prime is 21110292829. The reversal of 21110292823 is 32829201112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21110292823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110292829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555146411 + 10555146412.

It is an arithmetic number, because the mean of its divisors is an integer number (10555146412).

Almost surely, 2^21110292823 is an apocalyptic number.

21110292823 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110292823 is an equidigital number, since it uses as much as digits as its factorization.

21110292823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

Adding to 21110292823 its reverse (32829201112), we get a palindrome (53939493935).

The spelling of 21110292823 in words is "twenty-one billion, one hundred ten million, two hundred ninety-two thousand, eight hundred twenty-three".