21002220011189 has 2 divisors, whose sum is σ = 21002220011190. Its totient is φ = 21002220011188.

The previous prime is 21002220011159. The next prime is 21002220011341. The reversal of 21002220011189 is 98111002220012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12207092638225 + 8795127372964 = 3493865^2 + 2965658^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002220011189 - 2¹⁶ = 21002219945653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002220011119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501110005594 + 10501110005595.

It is an arithmetic number, because the mean of its divisors is an integer number (10501110005595).

Almost surely, 2^{21002220011189} is an apocalyptic number.

It is an amenable number.

21002220011189 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002220011189 is an equidigital number, since it uses as much as digits as its factorization.

21002220011189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 21002220011189 in words is "twenty-one trillion, two billion, two hundred twenty million, eleven thousand, one hundred eighty-nine".