221100212001211 has 16 divisors (see below), whose sum is σ = 231065942519808. Its totient is φ = 211354153920000.

The previous prime is 221100212001203. The next prime is 221100212001223. The reversal of 221100212001211 is 112100212001122.

It is a cyclic number.

It is not a de Polignac number, because 221100212001211 - 2³ = 221100212001203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221100212001271) 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, 43575451 + ... + 48384091.

It is an arithmetic number, because the mean of its divisors is an integer number (14441621407488).

Almost surely, 2^{221100212001211} is an apocalyptic number.

221100212001211 is a deficient number, since it is larger than the sum of its proper divisors (9965730518597).

221100212001211 is a wasteful number, since it uses less digits than its factorization.

221100212001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4831482.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221100212001211 its reverse (112100212001122), we get a palindrome (333200424002333).

The spelling of 221100212001211 in words is "two hundred twenty-one trillion, one hundred billion, two hundred twelve million, one thousand, two hundred eleven".