102112202221 has 2 divisors, whose sum is σ = 102112202222. Its totient is φ = 102112202220.

The previous prime is 102112202207. The next prime is 102112202239. The reversal of 102112202221 is 122202211201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51424632900 + 50687569321 = 226770^2 + 225139^2 .

It is a cyclic number.

It is not a de Polignac number, because 102112202221 - 2¹¹ = 102112200173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102112202195 and 102112202204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102112202281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51056101110 + 51056101111.

It is an arithmetic number, because the mean of its divisors is an integer number (51056101111).

Almost surely, 2^102112202221 is an apocalyptic number.

It is an amenable number.

102112202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

102112202221 is an equidigital number, since it uses as much as digits as its factorization.

102112202221 is an evil number, because the sum of its binary digits is even.

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

Adding to 102112202221 its reverse (122202211201), we get a palindrome (224314413422).

The spelling of 102112202221 in words is "one hundred two billion, one hundred twelve million, two hundred two thousand, two hundred twenty-one".