2101222201 has 16 divisors (see below), whose sum is σ = 2363872896. Its totient is φ = 1853191296.

The previous prime is 2101222199. The next prime is 2101222261. The reversal of 2101222201 is 1022221012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2101222201 - 2¹ = 2101222199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101222261) 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 15 ways as a sum of consecutive naturals, for example, 305466 + ... + 312268.

It is an arithmetic number, because the mean of its divisors is an integer number (147742056).

Almost surely, 2^2101222201 is an apocalyptic number.

It is an amenable number.

2101222201 is a deficient number, since it is larger than the sum of its proper divisors (262650695).

2101222201 is a wasteful number, since it uses less digits than its factorization.

2101222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7872.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2101222201 is about 45839.0903160174. The cubic root of 2101222201 is about 1280.8275493684.

Adding to 2101222201 its reverse (1022221012), we get a palindrome (3123443213).

The spelling of 2101222201 in words is "two billion, one hundred one million, two hundred twenty-two thousand, two hundred one".