102100203221 has 8 divisors (see below), whose sum is σ = 104368709760. Its totient is φ = 99849629952.

The previous prime is 102100203199. The next prime is 102100203229. The reversal of 102100203221 is 122302001201.

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 102100203221 - 2¹⁸ = 102099941077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102100203196 and 102100203205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102100203229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4471805 + ... + 4494578.

It is an arithmetic number, because the mean of its divisors is an integer number (13046088720).

Almost surely, 2^102100203221 is an apocalyptic number.

It is an amenable number.

102100203221 is a deficient number, since it is larger than the sum of its proper divisors (2268506539).

102100203221 is an equidigital number, since it uses as much as digits as its factorization.

102100203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8966635.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 102100203221 its reverse (122302001201), we get a palindrome (224402204422).

The spelling of 102100203221 in words is "one hundred two billion, one hundred million, two hundred three thousand, two hundred twenty-one".