21221933091383 has 2 divisors, whose sum is σ = 21221933091384. Its totient is φ = 21221933091382.

The previous prime is 21221933091379. The next prime is 21221933091481. The reversal of 21221933091383 is 38319033912212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21221933091383 - 2² = 21221933091379 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221933091343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610966545691 + 10610966545692.

It is an arithmetic number, because the mean of its divisors is an integer number (10610966545692).

Almost surely, 2^{21221933091383} is an apocalyptic number.

21221933091383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221933091383 is an equidigital number, since it uses as much as digits as its factorization.

21221933091383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 47.

The spelling of 21221933091383 in words is "twenty-one trillion, two hundred twenty-one billion, nine hundred thirty-three million, ninety-one thousand, three hundred eighty-three".