211201012221 has 32 divisors (see below), whose sum is σ = 288976343040. Its totient is φ = 137132642304.

The previous prime is 211201012199. The next prime is 211201012229. The reversal of 211201012221 is 122210102112.

It is not a de Polignac number, because 211201012221 - 2¹⁵ = 211200979453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211201012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211201012229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85609230 + ... + 85611696.

It is an arithmetic number, because the mean of its divisors is an integer number (9030510720).

Almost surely, 2^211201012221 is an apocalyptic number.

It is an amenable number.

211201012221 is a deficient number, since it is larger than the sum of its proper divisors (77775330819).

211201012221 is a wasteful number, since it uses less digits than its factorization.

211201012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4145.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211201012221 its reverse (122210102112), we get a palindrome (333411114333).

The spelling of 211201012221 in words is "two hundred eleven billion, two hundred one million, twelve thousand, two hundred twenty-one".