2120420121 has 8 divisors (see below), whose sum is σ = 2976028320. Its totient is φ = 1339212672.

The previous prime is 2120420063. The next prime is 2120420143. The reversal of 2120420121 is 1210240212.

2120420121 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-2120420121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2120420121.

It is not an unprimeable number, because it can be changed into a prime (2120420021) 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, 18600120 + ... + 18600233.

It is an arithmetic number, because the mean of its divisors is an integer number (372003540).

Almost surely, 2^2120420121 is an apocalyptic number.

It is an amenable number.

2120420121 is a deficient number, since it is larger than the sum of its proper divisors (855608199).

2120420121 is a wasteful number, since it uses less digits than its factorization.

2120420121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37200375.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2120420121 is about 46048.0197294086. The cubic root of 2120420121 is about 1284.7165107140.

Adding to 2120420121 its reverse (1210240212), we get a palindrome (3330660333).

The spelling of 2120420121 in words is "two billion, one hundred twenty million, four hundred twenty thousand, one hundred twenty-one".