221100121101211 has 4 divisors (see below), whose sum is σ = 241200132110424. Its totient is φ = 201000110092000.

The previous prime is 221100121101199. The next prime is 221100121101239. The reversal of 221100121101211 is 112101121001122.

221100121101211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221100121101211 - 2¹¹ = 221100121099163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221100121105211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10050005504590 + ... + 10050005504611.

It is an arithmetic number, because the mean of its divisors is an integer number (60300033027606).

Almost surely, 2^{221100121101211} is an apocalyptic number.

221100121101211 is a deficient number, since it is larger than the sum of its proper divisors (20100011009213).

221100121101211 is a wasteful number, since it uses less digits than its factorization.

221100121101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20100011009212.

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

Adding to 221100121101211 its reverse (112101121001122), we get a palindrome (333201242102333).

The spelling of 221100121101211 in words is "two hundred twenty-one trillion, one hundred billion, one hundred twenty-one million, one hundred one thousand, two hundred eleven".