120021200121 has 4 divisors (see below), whose sum is σ = 160028266832. Its totient is φ = 80014133412.

The previous prime is 120021200083. The next prime is 120021200129. The reversal of 120021200121 is 121002120021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 120021200121 - 2¹⁰ = 120021199097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120021200097 and 120021200106.

It is not an unprimeable number, because it can be changed into a prime (120021200129) 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, 20003533351 + ... + 20003533356.

It is an arithmetic number, because the mean of its divisors is an integer number (40007066708).

Almost surely, 2^120021200121 is an apocalyptic number.

It is an amenable number.

120021200121 is a deficient number, since it is larger than the sum of its proper divisors (40007066711).

120021200121 is an equidigital number, since it uses as much as digits as its factorization.

120021200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40007066710.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 120021200121 its reverse (121002120021), we get a palindrome (241023320142).

The spelling of 120021200121 in words is "one hundred twenty billion, twenty-one million, two hundred thousand, one hundred twenty-one".