21110113033 has 2 divisors, whose sum is σ = 21110113034. Its totient is φ = 21110113032.

The previous prime is 21110112979. The next prime is 21110113049. The reversal of 21110113033 is 33031101112.

It is an a-pointer prime, because the next prime (21110113049) can be obtained adding 21110113033 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13992997264 + 7117115769 = 118292^2 + 84363^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110113033 - 2⁹ = 21110112521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21110112998 and 21110113016.

It is not a weakly prime, because it can be changed into another prime (21110113733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555056516 + 10555056517.

It is an arithmetic number, because the mean of its divisors is an integer number (10555056517).

Almost surely, 2^21110113033 is an apocalyptic number.

It is an amenable number.

21110113033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110113033 is an equidigital number, since it uses as much as digits as its factorization.

21110113033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21110113033 its reverse (33031101112), we get a palindrome (54141214145).

The spelling of 21110113033 in words is "twenty-one billion, one hundred ten million, one hundred thirteen thousand, thirty-three".