2120202101 has 4 divisors (see below), whose sum is σ = 2165312832. Its totient is φ = 2075091372.

The previous prime is 2120202053. The next prime is 2120202143. The reversal of 2120202101 is 1012020212.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 2120202101 - 2⁶ = 2120202037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120202181) 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 3 ways as a sum of consecutive naturals, for example, 22555295 + ... + 22555388.

It is an arithmetic number, because the mean of its divisors is an integer number (541328208).

Almost surely, 2^2120202101 is an apocalyptic number.

It is an amenable number.

2120202101 is a deficient number, since it is larger than the sum of its proper divisors (45110731).

2120202101 is an equidigital number, since it uses as much as digits as its factorization.

2120202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45110730.

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

The square root of 2120202101 is about 46045.6523571987. The cubic root of 2120202101 is about 1284.6724780101.

Adding to 2120202101 its reverse (1012020212), we get a palindrome (3132222313).

The spelling of 2120202101 in words is "two billion, one hundred twenty million, two hundred two thousand, one hundred one".