21330223031101 has 2 divisors, whose sum is σ = 21330223031102. Its totient is φ = 21330223031100.

The previous prime is 21330223031087. The next prime is 21330223031129. The reversal of 21330223031101 is 10113032203312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19364972319225 + 1965250711876 = 4400565^2 + 1401874^2 .

It is a cyclic number.

It is not a de Polignac number, because 21330223031101 - 2²³ = 21330214642493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21330223031191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665111515550 + 10665111515551.

It is an arithmetic number, because the mean of its divisors is an integer number (10665111515551).

Almost surely, 2^{21330223031101} is an apocalyptic number.

It is an amenable number.

21330223031101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330223031101 is an equidigital number, since it uses as much as digits as its factorization.

21330223031101 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21330223031101 its reverse (10113032203312), we get a palindrome (31443255234413).

The spelling of 21330223031101 in words is "twenty-one trillion, three hundred thirty billion, two hundred twenty-three million, thirty-one thousand, one hundred one".