102211221221 has 16 divisors (see below), whose sum is σ = 107851853760. Its totient is φ = 96596997120.

The previous prime is 102211221193. The next prime is 102211221257. The reversal of 102211221221 is 122122112201.

It is not a de Polignac number, because 102211221221 - 2⁶ = 102211221157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102211221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102211221521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15974795 + ... + 15981191.

It is an arithmetic number, because the mean of its divisors is an integer number (6740740860).

Almost surely, 2^102211221221 is an apocalyptic number.

It is an amenable number.

102211221221 is a deficient number, since it is larger than the sum of its proper divisors (5640632539).

102211221221 is a wasteful number, since it uses less digits than its factorization.

102211221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8324.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 102211221221 its reverse (122122112201), we get a palindrome (224333333422).

The spelling of 102211221221 in words is "one hundred two billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twenty-one".