21133650233 has 2 divisors, whose sum is σ = 21133650234. Its totient is φ = 21133650232.

The previous prime is 21133650217. The next prime is 21133650253. The reversal of 21133650233 is 33205633112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12649950784 + 8483699449 = 112472^2 + 92107^2 .

It is a cyclic number.

It is not a de Polignac number, because 21133650233 - 2⁴ = 21133650217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21133650196 and 21133650205.

It is not a weakly prime, because it can be changed into another prime (21133650253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566825116 + 10566825117.

It is an arithmetic number, because the mean of its divisors is an integer number (10566825117).

Almost surely, 2^21133650233 is an apocalyptic number.

It is an amenable number.

21133650233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21133650233 is an equidigital number, since it uses as much as digits as its factorization.

21133650233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 29.

The spelling of 21133650233 in words is "twenty-one billion, one hundred thirty-three million, six hundred fifty thousand, two hundred thirty-three".