2120200121 has 16 divisors (see below), whose sum is σ = 2365137600. Its totient is φ = 1887133248.

The previous prime is 2120200111. The next prime is 2120200123. The reversal of 2120200121 is 1210020212.

It is a happy number.

It is not a de Polignac number, because 2120200121 - 2³⁰ = 1046458297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120200123) 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 15 ways as a sum of consecutive naturals, for example, 320570 + ... + 327116.

It is an arithmetic number, because the mean of its divisors is an integer number (147821100).

Almost surely, 2^2120200121 is an apocalyptic number.

It is an amenable number.

2120200121 is a deficient number, since it is larger than the sum of its proper divisors (244937479).

2120200121 is a wasteful number, since it uses less digits than its factorization.

2120200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7448.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2120200121 is about 46045.6308567925. The cubic root of 2120200121 is about 1284.6720781029.

Adding to 2120200121 its reverse (1210020212), we get a palindrome (3330220333).

The spelling of 2120200121 in words is "two billion, one hundred twenty million, two hundred thousand, one hundred twenty-one".