21110202022123 has 2 divisors, whose sum is σ = 21110202022124. Its totient is φ = 21110202022122.

The previous prime is 21110202022097. The next prime is 21110202022229. The reversal of 21110202022123 is 32122020201112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21110202022123 - 2³³ = 21101612087531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21110202022123.

It is not a weakly prime, because it can be changed into another prime (21110202022423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555101011061 + 10555101011062.

It is an arithmetic number, because the mean of its divisors is an integer number (10555101011062).

Almost surely, 2^{21110202022123} is an apocalyptic number.

21110202022123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110202022123 is an equidigital number, since it uses as much as digits as its factorization.

21110202022123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21110202022123 its reverse (32122020201112), we get a palindrome (53232222223235).

The spelling of 21110202022123 in words is "twenty-one trillion, one hundred ten billion, two hundred two million, twenty-two thousand, one hundred twenty-three".