102102211221 has 8 divisors (see below), whose sum is σ = 136138675680. Its totient is φ = 68066943792.

The previous prime is 102102211219. The next prime is 102102211243. The reversal of 102102211221 is 122112201201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102102211221 - 2¹ = 102102211219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102102211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102102216221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76555 + ... + 458328.

It is an arithmetic number, because the mean of its divisors is an integer number (17017334460).

Almost surely, 2^102102211221 is an apocalyptic number.

It is an amenable number.

102102211221 is a deficient number, since it is larger than the sum of its proper divisors (34036464459).

102102211221 is an equidigital number, since it uses as much as digits as its factorization.

102102211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598515.

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

Adding to 102102211221 its reverse (122112201201), we get a palindrome (224214412422).

The spelling of 102102211221 in words is "one hundred two billion, one hundred two million, two hundred eleven thousand, two hundred twenty-one".