102201122221 has 4 divisors (see below), whose sum is σ = 111492133344. Its totient is φ = 92910111100.

The previous prime is 102201122197. The next prime is 102201122239. The reversal of 102201122221 is 122221102201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102201122221 - 2⁹ = 102201121709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102201122195 and 102201122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102201123221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4645505545 + ... + 4645505566.

It is an arithmetic number, because the mean of its divisors is an integer number (27873033336).

Almost surely, 2^102201122221 is an apocalyptic number.

102201122221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102201122221 is a deficient number, since it is larger than the sum of its proper divisors (9291011123).

102201122221 is an equidigital number, since it uses as much as digits as its factorization.

102201122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9291011122.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102201122221 its reverse (122221102201), we get a palindrome (224422224422).

It can be divided in two parts, 102201 and 122221, that added together give a palindrome (224422).

The spelling of 102201122221 in words is "one hundred two billion, two hundred one million, one hundred twenty-two thousand, two hundred twenty-one".