21111331010233 has 2 divisors, whose sum is σ = 21111331010234. Its totient is φ = 21111331010232.

The previous prime is 21111331010221. The next prime is 21111331010309. The reversal of 21111331010233 is 33201013311112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20027799909049 + 1083531101184 = 4475243^2 + 1040928^2 .

It is a cyclic number.

It is not a de Polignac number, because 21111331010233 - 2⁵ = 21111331010201 is a prime.

It is not a weakly prime, because it can be changed into another prime (21111331010213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555665505116 + 10555665505117.

It is an arithmetic number, because the mean of its divisors is an integer number (10555665505117).

Almost surely, 2^{21111331010233} is an apocalyptic number.

It is an amenable number.

21111331010233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111331010233 is an equidigital number, since it uses as much as digits as its factorization.

21111331010233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 21111331010233 its reverse (33201013311112), we get a palindrome (54312344321345).

The spelling of 21111331010233 in words is "twenty-one trillion, one hundred eleven billion, three hundred thirty-one million, ten thousand, two hundred thirty-three".