221012101211 has 12 divisors (see below), whose sum is σ = 243169193400. Its totient is φ = 200722806240.

The previous prime is 221012101187. The next prime is 221012101217. The reversal of 221012101211 is 112101210122.

221012101211 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 221012101211 - 2³⁰ = 219938359387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221012101217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 772946 + ... + 1019543.

It is an arithmetic number, because the mean of its divisors is an integer number (20264099450).

Almost surely, 2^221012101211 is an apocalyptic number.

221012101211 is a deficient number, since it is larger than the sum of its proper divisors (22157092189).

221012101211 is a wasteful number, since it uses less digits than its factorization.

221012101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793530 (or 1793519 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221012101211 its reverse (112101210122), we get a palindrome (333113311333).

It can be divided in two parts, 22101210121 and 1, that added together give a palindrome (22101210122).

The spelling of 221012101211 in words is "two hundred twenty-one billion, twelve million, one hundred one thousand, two hundred eleven".