120203312123121 has 64 divisors (see below), whose sum is σ = 169952614318080. Its totient is φ = 75465007188480.

The previous prime is 120203312123101. The next prime is 120203312123183. The reversal of 120203312123121 is 121321213302021.

It is not a de Polignac number, because 120203312123121 - 2²¹ = 120203310025969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120203312123091 and 120203312123100.

It is not an unprimeable number, because it can be changed into a prime (120203312123101) 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 in 63 ways as a sum of consecutive naturals, for example, 154485765 + ... + 155261901.

It is an arithmetic number, because the mean of its divisors is an integer number (2655509598720).

Almost surely, 2^{120203312123121} is an apocalyptic number.

It is an amenable number.

120203312123121 is a deficient number, since it is larger than the sum of its proper divisors (49749302194959).

120203312123121 is a wasteful number, since it uses less digits than its factorization.

120203312123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776534.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 120203312123121 its reverse (121321213302021), we get a palindrome (241524525425142).

The spelling of 120203312123121 in words is "one hundred twenty trillion, two hundred three billion, three hundred twelve million, one hundred twenty-three thousand, one hundred twenty-one".