21022011110993 has 2 divisors, whose sum is σ = 21022011110994. Its totient is φ = 21022011110992.

The previous prime is 21022011110963. The next prime is 21022011111019. The reversal of 21022011110993 is 39901111022012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20158016693824 + 863994417169 = 4489768^2 + 929513^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022011110993 - 2¹⁶ = 21022011045457 is a prime.

It is not a weakly prime, because it can be changed into another prime (21022011110963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511005555496 + 10511005555497.

It is an arithmetic number, because the mean of its divisors is an integer number (10511005555497).

Almost surely, 2^{21022011110993} is an apocalyptic number.

It is an amenable number.

21022011110993 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022011110993 is an equidigital number, since it uses as much as digits as its factorization.

21022011110993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 32.

The spelling of 21022011110993 in words is "twenty-one trillion, twenty-two billion, eleven million, one hundred ten thousand, nine hundred ninety-three".