102102201221 has 4 divisors (see below), whose sum is σ = 103093484832. Its totient is φ = 101110917612.

The previous prime is 102102201203. The next prime is 102102201241. The reversal of 102102201221 is 122102201201.

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 102102201221 - 2³⁰ = 101028459397 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 = 102102201196 and 102102201205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102102201241) 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, 495641651 + ... + 495641856.

It is an arithmetic number, because the mean of its divisors is an integer number (25773371208).

Almost surely, 2^102102201221 is an apocalyptic number.

It is an amenable number.

102102201221 is a deficient number, since it is larger than the sum of its proper divisors (991283611).

102102201221 is an equidigital number, since it uses as much as digits as its factorization.

102102201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991283610.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102102201221 its reverse (122102201201), we get a palindrome (224204402422).

The spelling of 102102201221 in words is "one hundred two billion, one hundred two million, two hundred one thousand, two hundred twenty-one".