221211120002011 has 4 divisors (see below), whose sum is σ = 221211301941000. Its totient is φ = 221210938063024.

The previous prime is 221211120001981. The next prime is 221211120002027. The reversal of 221211120002011 is 110200021112122.

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 221211120002011 - 2³⁹ = 220661364188123 is a prime.

It is a super-2 number, since 2×221211120002011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221211120002071) 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, 89133361 + ... + 91581538.

It is an arithmetic number, because the mean of its divisors is an integer number (55302825485250).

Almost surely, 2^{221211120002011} is an apocalyptic number.

221211120002011 is a deficient number, since it is larger than the sum of its proper divisors (181938989).

221211120002011 is a wasteful number, since it uses less digits than its factorization.

221211120002011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181938988.

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

Adding to 221211120002011 its reverse (110200021112122), we get a palindrome (331411141114133).

The spelling of 221211120002011 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred twenty million, two thousand, eleven".