102122121222221 has 2 divisors, whose sum is σ = 102122121222222. Its totient is φ = 102122121222220.

The previous prime is 102122121222157. The next prime is 102122121222259. The reversal of 102122121222221 is 122222121221201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99898625704900 + 2223495517321 = 9994930^2 + 1491139^2 .

It is a cyclic number.

It is not a de Polignac number, because 102122121222221 - 2⁶ = 102122121222157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102122121222281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51061060611110 + 51061060611111.

It is an arithmetic number, because the mean of its divisors is an integer number (51061060611111).

Almost surely, 2^{102122121222221} is an apocalyptic number.

It is an amenable number.

102122121222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

102122121222221 is an equidigital number, since it uses as much as digits as its factorization.

102122121222221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 102122121222221 its reverse (122222121221201), we get a palindrome (224344242443422).

The spelling of 102122121222221 in words is "one hundred two trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".