12211221101 has 8 divisors (see below), whose sum is σ = 12667401600. Its totient is φ = 11762580960.

The previous prime is 12211221049. The next prime is 12211221109. The reversal of 12211221101 is 10112211221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12211221101 - 2³⁰ = 11137479277 is a prime.

It is a super-4 number, since 4×12211221101⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211221109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1881791 + ... + 1888268.

It is an arithmetic number, because the mean of its divisors is an integer number (1583425200).

Almost surely, 2^12211221101 is an apocalyptic number.

It is an amenable number.

12211221101 is a deficient number, since it is larger than the sum of its proper divisors (456180499).

12211221101 is an equidigital number, since it uses as much as digits as its factorization.

12211221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3770179.

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

Adding to 12211221101 its reverse (10112211221), we get a palindrome (22323432322).

It can be divided in two parts, 12211221 and 101, that multiplied together give a palindrome (1233333321).

The spelling of 12211221101 in words is "twelve billion, two hundred eleven million, two hundred twenty-one thousand, one hundred one".