21110233373 has 2 divisors, whose sum is σ = 21110233374. Its totient is φ = 21110233372.

The previous prime is 21110233369. The next prime is 21110233379. The reversal of 21110233373 is 37333201112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20840387044 + 269846329 = 144362^2 + 16427^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110233373 - 2² = 21110233369 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110233379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555116686 + 10555116687.

It is an arithmetic number, because the mean of its divisors is an integer number (10555116687).

Almost surely, 2^21110233373 is an apocalyptic number.

It is an amenable number.

21110233373 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110233373 is an equidigital number, since it uses as much as digits as its factorization.

21110233373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 26.

Adding to 21110233373 its reverse (37333201112), we get a palindrome (58443434485).

The spelling of 21110233373 in words is "twenty-one billion, one hundred ten million, two hundred thirty-three thousand, three hundred seventy-three".