102210211221 has 32 divisors (see below), whose sum is σ = 146212577280. Its totient is φ = 63352713600.

The previous prime is 102210211163. The next prime is 102210211237. The reversal of 102210211221 is 122112012201.

It is not a de Polignac number, because 102210211221 - 2⁹ = 102210210709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102210211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102210211721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 700000 + ... + 833318.

It is an arithmetic number, because the mean of its divisors is an integer number (4569143040).

Almost surely, 2^102210211221 is an apocalyptic number.

It is an amenable number.

102210211221 is a deficient number, since it is larger than the sum of its proper divisors (44002366059).

102210211221 is a wasteful number, since it uses less digits than its factorization.

102210211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133657.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102210211221 its reverse (122112012201), we get a palindrome (224322223422).

The spelling of 102210211221 in words is "one hundred two billion, two hundred ten million, two hundred eleven thousand, two hundred twenty-one".