102202021221 has 16 divisors (see below), whose sum is σ = 136544184000. Its totient is φ = 67997333888.

The previous prime is 102202021169. The next prime is 102202021223. The reversal of 102202021221 is 122120202201.

It is a cyclic number.

It is not a de Polignac number, because 102202021221 - 2¹³ = 102202013029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102202021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102202021223) 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, 12540670 + ... + 12548816.

It is an arithmetic number, because the mean of its divisors is an integer number (8534011500).

Almost surely, 2^102202021221 is an apocalyptic number.

It is an amenable number.

102202021221 is a deficient number, since it is larger than the sum of its proper divisors (34342162779).

102202021221 is an equidigital number, since it uses as much as digits as its factorization.

102202021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16068.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 102202021221 its reverse (122120202201), we get a palindrome (224322223422).

The spelling of 102202021221 in words is "one hundred two billion, two hundred two million, twenty-one thousand, two hundred twenty-one".