210100221199969 has 2 divisors, whose sum is σ = 210100221199970. Its totient is φ = 210100221199968.

The previous prime is 210100221199961. The next prime is 210100221200017. The reversal of 210100221199969 is 969991122001012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119649907171600 + 90450314028369 = 10938460^2 + 9510537^2 .

It is a cyclic number.

It is not a de Polignac number, because 210100221199969 - 2³ = 210100221199961 is a prime.

It is a super-2 number, since 2×210100221199969² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210100221199961) 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, 105050110599984 + 105050110599985.

It is an arithmetic number, because the mean of its divisors is an integer number (105050110599985).

Almost surely, 2^{210100221199969} is an apocalyptic number.

It is an amenable number.

210100221199969 is a deficient number, since it is larger than the sum of its proper divisors (1).

210100221199969 is an equidigital number, since it uses as much as digits as its factorization.

210100221199969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 52.

The spelling of 210100221199969 in words is "two hundred ten trillion, one hundred billion, two hundred twenty-one million, one hundred ninety-nine thousand, nine hundred sixty-nine".