102222121210221 has 16 divisors (see below), whose sum is σ = 138163772504384. Its totient is φ = 67214282661504.

The previous prime is 102222121210207. The next prime is 102222121210243. The reversal of 102222121210221 is 122012121222201.

It is not a de Polignac number, because 102222121210221 - 2¹¹ = 102222121208173 is a prime.

It is a super-2 number, since 2×102222121210221² (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 (102222121210291) 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, 66611655 + ... + 68128971.

It is an arithmetic number, because the mean of its divisors is an integer number (8635235781524).

Almost surely, 2^{102222121210221} is an apocalyptic number.

It is an amenable number.

102222121210221 is a deficient number, since it is larger than the sum of its proper divisors (35941651294163).

102222121210221 is a wasteful number, since it uses less digits than its factorization.

102222121210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825020.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 102222121210221 its reverse (122012121222201), we get a palindrome (224234242432422).

The spelling of 102222121210221 in words is "one hundred two trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred ten thousand, two hundred twenty-one".