120211210120121 has 4 divisors (see below), whose sum is σ = 120505125059700. Its totient is φ = 119917295180544.

The previous prime is 120211210120109. The next prime is 120211210120171. The reversal of 120211210120121 is 121021012112021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52893779841721 + 67317430278400 = 7272811^2 + 8204720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120211210120121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120211210120121.

It is not an unprimeable number, because it can be changed into a prime (120211210120171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146957469176 + ... + 146957469993.

It is an arithmetic number, because the mean of its divisors is an integer number (30126281264925).

Almost surely, 2^{120211210120121} is an apocalyptic number.

It is an amenable number.

120211210120121 is a deficient number, since it is larger than the sum of its proper divisors (293914939579).

120211210120121 is an equidigital number, since it uses as much as digits as its factorization.

120211210120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293914939578.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 120211210120121 its reverse (121021012112021), we get a palindrome (241232222232142).

The spelling of 120211210120121 in words is "one hundred twenty trillion, two hundred eleven billion, two hundred ten million, one hundred twenty thousand, one hundred twenty-one".