102120122120021 has 2 divisors, whose sum is σ = 102120122120022. Its totient is φ = 102120122120020.

The previous prime is 102120122119997. The next prime is 102120122120039. The reversal of 102120122120021 is 120021221021201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101610734446225 + 509387673796 = 10080215^2 + 713714^2 .

It is an emirp because it is prime and its reverse (120021221021201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102120122120021 - 2⁶ = 102120122119957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102120122120221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060061060010 + 51060061060011.

It is an arithmetic number, because the mean of its divisors is an integer number (51060061060011).

Almost surely, 2^{102120122120021} is an apocalyptic number.

It is an amenable number.

102120122120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102120122120021 is an equidigital number, since it uses as much as digits as its factorization.

102120122120021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 102120122120021 its reverse (120021221021201), we get a palindrome (222141343141222).

The spelling of 102120122120021 in words is "one hundred two trillion, one hundred twenty billion, one hundred twenty-two million, one hundred twenty thousand, twenty-one".