201221000211 has 32 divisors (see below), whose sum is σ = 334522257408. Its totient is φ = 104522574240.

The previous prime is 201221000203. The next prime is 201221000257. The reversal of 201221000211 is 112000122102.

It is not a de Polignac number, because 201221000211 - 2³ = 201221000203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201221100211) 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, 4320330 + ... + 4366656.

It is an arithmetic number, because the mean of its divisors is an integer number (10453820544).

Almost surely, 2^201221000211 is an apocalyptic number.

201221000211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

201221000211 is a deficient number, since it is larger than the sum of its proper divisors (133301257197).

201221000211 is a wasteful number, since it uses less digits than its factorization.

201221000211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65151.

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

Adding to 201221000211 its reverse (112000122102), we get a palindrome (313221122313).

The spelling of 201221000211 in words is "two hundred one billion, two hundred twenty-one million, two hundred eleven", and thus it is an aban number.