102223221221 has 4 divisors (see below), whose sum is σ = 111516241344. Its totient is φ = 92930201100.

The previous prime is 102223221211. The next prime is 102223221253. The reversal of 102223221221 is 122122322201.

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 de Polignac number, because none of the positive numbers 2^k-102223221221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102223221193 and 102223221202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102223221211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4646510045 + ... + 4646510066.

It is an arithmetic number, because the mean of its divisors is an integer number (27879060336).

Almost surely, 2^102223221221 is an apocalyptic number.

102223221221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102223221221 is a deficient number, since it is larger than the sum of its proper divisors (9293020123).

102223221221 is an equidigital number, since it uses as much as digits as its factorization.

102223221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9293020122.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 102223221221 its reverse (122122322201), we get a palindrome (224345543422).

The spelling of 102223221221 in words is "one hundred two billion, two hundred twenty-three million, two hundred twenty-one thousand, two hundred twenty-one".