21021213732383 has 2 divisors, whose sum is σ = 21021213732384. Its totient is φ = 21021213732382.

The previous prime is 21021213732371. The next prime is 21021213732427. The reversal of 21021213732383 is 38323731212012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21021213732383 - 2⁶ = 21021213732319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21021213732283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510606866191 + 10510606866192.

It is an arithmetic number, because the mean of its divisors is an integer number (10510606866192).

Almost surely, 2^{21021213732383} is an apocalyptic number.

21021213732383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021213732383 is an equidigital number, since it uses as much as digits as its factorization.

21021213732383 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 38.

Adding to 21021213732383 its reverse (38323731212012), we get a palindrome (59344944944395).

The spelling of 21021213732383 in words is "twenty-one trillion, twenty-one billion, two hundred thirteen million, seven hundred thirty-two thousand, three hundred eighty-three".