21124202233 has 2 divisors, whose sum is σ = 21124202234. Its totient is φ = 21124202232.

The previous prime is 21124202221. The next prime is 21124202273. The reversal of 21124202233 is 33220242112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18249848464 + 2874353769 = 135092^2 + 53613^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21124202233 is a prime.

It is not a weakly prime, because it can be changed into another prime (21124202213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10562101116 + 10562101117.

It is an arithmetic number, because the mean of its divisors is an integer number (10562101117).

Almost surely, 2^21124202233 is an apocalyptic number.

It is an amenable number.

21124202233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21124202233 is an equidigital number, since it uses as much as digits as its factorization.

21124202233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21124202233 its reverse (33220242112), we get a palindrome (54344444345).

The spelling of 21124202233 in words is "twenty-one billion, one hundred twenty-four million, two hundred two thousand, two hundred thirty-three".