102220121111221 has 8 divisors (see below), whose sum is σ = 103675101418944. Its totient is φ = 100765564700640.

The previous prime is 102220121111189. The next prime is 102220121111257. The reversal of 102220121111221 is 122111121022201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 102220121111221 - 2⁵ = 102220121111189 is a prime.

It is a super-2 number, since 2×102220121111221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102220121111821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105488551 + ... + 106453156.

It is an arithmetic number, because the mean of its divisors is an integer number (12959387677368).

Almost surely, 2^{102220121111221} is an apocalyptic number.

It is an amenable number.

102220121111221 is a deficient number, since it is larger than the sum of its proper divisors (1454980307723).

102220121111221 is an equidigital number, since it uses as much as digits as its factorization.

102220121111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211948571.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 102220121111221 its reverse (122111121022201), we get a palindrome (224331242133422).

The spelling of 102220121111221 in words is "one hundred two trillion, two hundred twenty billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-one".