21112031033 has 2 divisors, whose sum is σ = 21112031034. Its totient is φ = 21112031032.

The previous prime is 21112031011. The next prime is 21112031041. The reversal of 21112031033 is 33013021112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20129083129 + 982947904 = 141877^2 + 31352^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112031033 - 2⁶ = 21112030969 is a prime.

It is not a weakly prime, because it can be changed into another prime (21112031533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556015516 + 10556015517.

It is an arithmetic number, because the mean of its divisors is an integer number (10556015517).

Almost surely, 2^21112031033 is an apocalyptic number.

It is an amenable number.

21112031033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112031033 is an equidigital number, since it uses as much as digits as its factorization.

21112031033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21112031033 its reverse (33013021112), we get a palindrome (54125052145).

The spelling of 21112031033 in words is "twenty-one billion, one hundred twelve million, thirty-one thousand, thirty-three".