21120022012091 has 2 divisors, whose sum is σ = 21120022012092. Its totient is φ = 21120022012090.

The previous prime is 21120022011997. The next prime is 21120022012093. The reversal of 21120022012091 is 19021022002112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21120022012091 - 2¹⁴ = 21120021995707 is a prime.

Together with 21120022012093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21120022012093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560011006045 + 10560011006046.

It is an arithmetic number, because the mean of its divisors is an integer number (10560011006046).

Almost surely, 2^{21120022012091} is an apocalyptic number.

21120022012091 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120022012091 is an equidigital number, since it uses as much as digits as its factorization.

21120022012091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 21120022012091 in words is "twenty-one trillion, one hundred twenty billion, twenty-two million, twelve thousand, ninety-one".