2120022101 has 4 divisors (see below), whose sum is σ = 2160022572. Its totient is φ = 2080021632.

The previous prime is 2120022067. The next prime is 2120022133. The reversal of 2120022101 is 1012200212.

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 1718019601 + 402002500 = 41449^2 + 20050^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120022101 - 2²² = 2115827797 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 (2120052101) 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, 20000156 + ... + 20000261.

It is an arithmetic number, because the mean of its divisors is an integer number (540005643).

Almost surely, 2^2120022101 is an apocalyptic number.

It is an amenable number.

2120022101 is a deficient number, since it is larger than the sum of its proper divisors (40000471).

2120022101 is an equidigital number, since it uses as much as digits as its factorization.

2120022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40000470.

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

The square root of 2120022101 is about 46043.6977337833. The cubic root of 2120022101 is about 1284.6361217920.

Adding to 2120022101 its reverse (1012200212), we get a palindrome (3132222313).

The spelling of 2120022101 in words is "two billion, one hundred twenty million, twenty-two thousand, one hundred one".