120021122121 has 8 divisors (see below), whose sum is σ = 160439547840. Its totient is φ = 79808388912.

The previous prime is 120021122087. The next prime is 120021122129. The reversal of 120021122121 is 121221120021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120021122121 - 2⁶ = 120021122057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120021122121.

It is not an unprimeable number, because it can be changed into a prime (120021122129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51421765 + ... + 51424098.

It is an arithmetic number, because the mean of its divisors is an integer number (20054943480).

Almost surely, 2^120021122121 is an apocalyptic number.

It is an amenable number.

120021122121 is a deficient number, since it is larger than the sum of its proper divisors (40418425719).

120021122121 is a wasteful number, since it uses less digits than its factorization.

120021122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102846255.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 120021122121 its reverse (121221120021), we get a palindrome (241242242142).

The spelling of 120021122121 in words is "one hundred twenty billion, twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".