21233042053 has 2 divisors, whose sum is σ = 21233042054. Its totient is φ = 21233042052.

The previous prime is 21233042023. The next prime is 21233042057. The reversal of 21233042053 is 35024033212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14755689729 + 6477352324 = 121473^2 + 80482^2 .

It is a cyclic number.

It is not a de Polignac number, because 21233042053 - 2⁵ = 21233042021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21233042057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616521026 + 10616521027.

It is an arithmetic number, because the mean of its divisors is an integer number (10616521027).

Almost surely, 2^21233042053 is an apocalyptic number.

It is an amenable number.

21233042053 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233042053 is an equidigital number, since it uses as much as digits as its factorization.

21233042053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 21233042053 its reverse (35024033212), we get a palindrome (56257075265).

The spelling of 21233042053 in words is "twenty-one billion, two hundred thirty-three million, forty-two thousand, fifty-three".