120102181021 has 2 divisors, whose sum is σ = 120102181022. Its totient is φ = 120102181020.

The previous prime is 120102181013. The next prime is 120102181027. The reversal of 120102181021 is 120181201021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109832588100 + 10269592921 = 331410^2 + 101339^2 .

It is a cyclic number.

It is not a de Polignac number, because 120102181021 - 2³ = 120102181013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120102181021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120102181027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60051090510 + 60051090511.

It is an arithmetic number, because the mean of its divisors is an integer number (60051090511).

Almost surely, 2^120102181021 is an apocalyptic number.

It is an amenable number.

120102181021 is a deficient number, since it is larger than the sum of its proper divisors (1).

120102181021 is an equidigital number, since it uses as much as digits as its factorization.

120102181021 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 19.

Adding to 120102181021 its reverse (120181201021), we get a palindrome (240283382042).

The spelling of 120102181021 in words is "one hundred twenty billion, one hundred two million, one hundred eighty-one thousand, twenty-one".