102211221999 has 4 divisors (see below), whose sum is σ = 136281629336. Its totient is φ = 68140814664.

The previous prime is 102211221977. The next prime is 102211222027. The reversal of 102211221999 is 999122112201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 102211221999 - 2⁵ = 102211221967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102211221929) 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 in 3 ways as a sum of consecutive naturals, for example, 17035203664 + ... + 17035203669.

It is an arithmetic number, because the mean of its divisors is an integer number (34070407334).

Almost surely, 2^102211221999 is an apocalyptic number.

102211221999 is a deficient number, since it is larger than the sum of its proper divisors (34070407337).

102211221999 is an equidigital number, since it uses as much as digits as its factorization.

102211221999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34070407336.

The product of its (nonzero) digits is 11664, while the sum is 39.

The spelling of 102211221999 in words is "one hundred two billion, two hundred eleven million, two hundred twenty-one thousand, nine hundred ninety-nine".