2221999023869 has 2 divisors, whose sum is σ = 2221999023870. Its totient is φ = 2221999023868.

The previous prime is 2221999023859. The next prime is 2221999023887. The reversal of 2221999023869 is 9683209991222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1297059043225 + 924939980644 = 1138885^2 + 961738^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221999023869 is a prime.

It is a super-2 number, since 2×2221999023869² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221999023859) 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, 1110999511934 + 1110999511935.

It is an arithmetic number, because the mean of its divisors is an integer number (1110999511935).

Almost surely, 2^{2221999023869} is an apocalyptic number.

It is an amenable number.

2221999023869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221999023869 is an equidigital number, since it uses as much as digits as its factorization.

2221999023869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15116544, while the sum is 62.

The spelling of 2221999023869 in words is "two trillion, two hundred twenty-one billion, nine hundred ninety-nine million, twenty-three thousand, eight hundred sixty-nine".