211200002221 has 16 divisors (see below), whose sum is σ = 228807699120. Its totient is φ = 193787804160.

The previous prime is 211200002219. The next prime is 211200002227. The reversal of 211200002221 is 122200002112.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 12996 + 211199989225 = 114^2 + 459565^2 .

It is a cyclic number.

It is not a de Polignac number, because 211200002221 - 2¹ = 211200002219 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211200002227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5413641 + ... + 5452513.

It is an arithmetic number, because the mean of its divisors is an integer number (14300481195).

Almost surely, 2^211200002221 is an apocalyptic number.

It is an amenable number.

211200002221 is a deficient number, since it is larger than the sum of its proper divisors (17607696899).

211200002221 is a wasteful number, since it uses less digits than its factorization.

211200002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41376.

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

Adding to 211200002221 its reverse (122200002112), we get a palindrome (333400004333).

The spelling of 211200002221 in words is "two hundred eleven billion, two hundred million, two thousand, two hundred twenty-one".