102100011210221 has 2 divisors, whose sum is σ = 102100011210222. Its totient is φ = 102100011210220.

The previous prime is 102100011210121. The next prime is 102100011210293. The reversal of 102100011210221 is 122012110001201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52718330826121 + 49381680384100 = 7260739^2 + 7027210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102100011210221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102100011210196 and 102100011210205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102100011210121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51050005605110 + 51050005605111.

It is an arithmetic number, because the mean of its divisors is an integer number (51050005605111).

Almost surely, 2^{102100011210221} is an apocalyptic number.

It is an amenable number.

102100011210221 is a deficient number, since it is larger than the sum of its proper divisors (1).

102100011210221 is an equidigital number, since it uses as much as digits as its factorization.

102100011210221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 102100011210221 its reverse (122012110001201), we get a palindrome (224112121211422).

The spelling of 102100011210221 in words is "one hundred two trillion, one hundred billion, eleven million, two hundred ten thousand, two hundred twenty-one".