2120021201 has 4 divisors (see below), whose sum is σ = 2120187492. Its totient is φ = 2119854912.

The previous prime is 2120021179. The next prime is 2120021237. The reversal of 2120021201 is 1021200212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1263873601 + 856147600 = 35551^2 + 29260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120021201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120029201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62276 + ... + 90101.

It is an arithmetic number, because the mean of its divisors is an integer number (530046873).

Almost surely, 2^2120021201 is an apocalyptic number.

It is an amenable number.

2120021201 is a deficient number, since it is larger than the sum of its proper divisors (166291).

2120021201 is a wasteful number, since it uses less digits than its factorization.

2120021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166290.

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

The square root of 2120021201 is about 46043.6879604577. The cubic root of 2120021201 is about 1284.6359400057.

Adding to 2120021201 its reverse (1021200212), we get a palindrome (3141221413).

The spelling of 2120021201 in words is "two billion, one hundred twenty million, twenty-one thousand, two hundred one".