21330223031191 has 2 divisors, whose sum is σ = 21330223031192. Its totient is φ = 21330223031190.

The previous prime is 21330223031177. The next prime is 21330223031203. The reversal of 21330223031191 is 19113032203312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21330223031191 - 2²⁷ = 21330088813463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21330223031101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665111515595 + 10665111515596.

It is an arithmetic number, because the mean of its divisors is an integer number (10665111515596).

Almost surely, 2^{21330223031191} is an apocalyptic number.

21330223031191 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330223031191 is an equidigital number, since it uses as much as digits as its factorization.

21330223031191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The spelling of 21330223031191 in words is "twenty-one trillion, three hundred thirty billion, two hundred twenty-three million, thirty-one thousand, one hundred ninety-one".