2100120121 has 8 divisors (see below), whose sum is σ = 2320041600. Its totient is φ = 1885032240.

The previous prime is 2100120107. The next prime is 2100120149. The reversal of 2100120121 is 1210210012.

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

It is a cyclic number.

It is not a de Polignac number, because 2100120121 - 2⁵ = 2100120089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100120098 and 2100120107.

It is not an unprimeable number, because it can be changed into a prime (2100120151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1207486 + ... + 1209223.

It is an arithmetic number, because the mean of its divisors is an integer number (290005200).

Almost surely, 2^2100120121 is an apocalyptic number.

It is an amenable number.

2100120121 is a deficient number, since it is larger than the sum of its proper divisors (219921479).

2100120121 is a wasteful number, since it uses less digits than its factorization.

2100120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416799.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2100120121 is about 45827.0675583765. The cubic root of 2100120121 is about 1280.6035811013.

Adding to 2100120121 its reverse (1210210012), we get a palindrome (3310330133).

It can be divided in two parts, 2100 and 120121, that added together give a palindrome (122221).

The spelling of 2100120121 in words is "two billion, one hundred million, one hundred twenty thousand, one hundred twenty-one".