21111233323 has 2 divisors, whose sum is σ = 21111233324. Its totient is φ = 21111233322.

The previous prime is 21111233309. The next prime is 21111233333. The reversal of 21111233323 is 32333211112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21111233323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21111233294 and 21111233303.

It is not a weakly prime, because it can be changed into another prime (21111233333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555616661 + 10555616662.

It is an arithmetic number, because the mean of its divisors is an integer number (10555616662).

Almost surely, 2^21111233323 is an apocalyptic number.

21111233323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111233323 is an equidigital number, since it uses as much as digits as its factorization.

21111233323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 22.

Adding to 21111233323 its reverse (32333211112), we get a palindrome (53444444435).

The spelling of 21111233323 in words is "twenty-one billion, one hundred eleven million, two hundred thirty-three thousand, three hundred twenty-three".