2101212201 has 16 divisors (see below), whose sum is σ = 3072319488. Its totient is φ = 1266790800.

The previous prime is 2101212143. The next prime is 2101212229. The reversal of 2101212201 is 1022121012.

It is not a de Polignac number, because 2101212201 - 2⁶ = 2101212137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2101212241) 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, 160381 + ... + 172986.

It is an arithmetic number, because the mean of its divisors is an integer number (192019968).

Almost surely, 2^2101212201 is an apocalyptic number.

It is an amenable number.

2101212201 is a deficient number, since it is larger than the sum of its proper divisors (971107287).

2101212201 is a wasteful number, since it uses less digits than its factorization.

2101212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333572.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2101212201 is about 45838.9812386794. The cubic root of 2101212201 is about 1280.8255174881.

Adding to 2101212201 its reverse (1022121012), we get a palindrome (3123333213).

The spelling of 2101212201 in words is "two billion, one hundred one million, two hundred twelve thousand, two hundred one".