21221933091343 has 2 divisors, whose sum is σ = 21221933091344. Its totient is φ = 21221933091342.

The previous prime is 21221933091311. The next prime is 21221933091371. The reversal of 21221933091343 is 34319033912212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21221933091343 - 2⁵ = 21221933091311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21221933091343.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221933091383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610966545671 + 10610966545672.

It is an arithmetic number, because the mean of its divisors is an integer number (10610966545672).

Almost surely, 2^{21221933091343} is an apocalyptic number.

21221933091343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221933091343 is an equidigital number, since it uses as much as digits as its factorization.

21221933091343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 43.

The spelling of 21221933091343 in words is "twenty-one trillion, two hundred twenty-one billion, nine hundred thirty-three million, ninety-one thousand, three hundred forty-three".