21233010101243 has 2 divisors, whose sum is σ = 21233010101244. Its totient is φ = 21233010101242.

The previous prime is 21233010101207. The next prime is 21233010101263. The reversal of 21233010101243 is 34210101033212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21233010101243 is a prime.

It is a super-2 number, since 2×21233010101243² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21233010101263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616505050621 + 10616505050622.

It is an arithmetic number, because the mean of its divisors is an integer number (10616505050622).

Almost surely, 2^{21233010101243} is an apocalyptic number.

21233010101243 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233010101243 is an equidigital number, since it uses as much as digits as its factorization.

21233010101243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21233010101243 its reverse (34210101033212), we get a palindrome (55443111134455).

The spelling of 21233010101243 in words is "twenty-one trillion, two hundred thirty-three billion, ten million, one hundred one thousand, two hundred forty-three".