21233104391 has 2 divisors, whose sum is σ = 21233104392. Its totient is φ = 21233104390.

The previous prime is 21233104337. The next prime is 21233104429. The reversal of 21233104391 is 19340133212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21233104391 - 2¹⁴ = 21233088007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21233104301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616552195 + 10616552196.

It is an arithmetic number, because the mean of its divisors is an integer number (10616552196).

Almost surely, 2^21233104391 is an apocalyptic number.

21233104391 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233104391 is an equidigital number, since it uses as much as digits as its factorization.

21233104391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 21233104391 in words is "twenty-one billion, two hundred thirty-three million, one hundred four thousand, three hundred ninety-one".