2211212021201 has 4 divisors (see below), whose sum is σ = 2211224930100. Its totient is φ = 2211199112304.

The previous prime is 2211212021191. The next prime is 2211212021233. The reversal of 2211212021201 is 1021202121122.

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 781570924225 + 1429641096976 = 884065^2 + 1195676^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211212021201 - 2¹⁰ = 2211212020177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2211212021201.

It is not an unprimeable number, because it can be changed into a prime (2211212221201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6194006 + ... + 6541263.

It is an arithmetic number, because the mean of its divisors is an integer number (552806232525).

Almost surely, 2^{2211212021201} is an apocalyptic number.

It is an amenable number.

2211212021201 is a deficient number, since it is larger than the sum of its proper divisors (12908899).

2211212021201 is a wasteful number, since it uses less digits than its factorization.

2211212021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12908898.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2211212021201 its reverse (1021202121122), we get a palindrome (3232414142323).

The spelling of 2211212021201 in words is "two trillion, two hundred eleven billion, two hundred twelve million, twenty-one thousand, two hundred one".