221211000011211 has 16 divisors (see below), whose sum is σ = 337085140825344. Its totient is φ = 126405643631904.

The previous prime is 221211000011161. The next prime is 221211000011213. The reversal of 221211000011211 is 112110000112122.

It is a happy number.

221211000011211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221211000011211 - 2¹⁸ = 221210999749067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221211000011213) 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, 22505365 + ... + 30804438.

It is an arithmetic number, because the mean of its divisors is an integer number (21067821301584).

Almost surely, 2^{221211000011211} is an apocalyptic number.

221211000011211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221211000011211 is a deficient number, since it is larger than the sum of its proper divisors (115874140814133).

221211000011211 is a wasteful number, since it uses less digits than its factorization.

221211000011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53507410.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221211000011211 its reverse (112110000112122), we get a palindrome (333321000123333).

The spelling of 221211000011211 in words is "two hundred twenty-one trillion, two hundred eleven billion, eleven thousand, two hundred eleven".