12120221101 has 32 divisors (see below), whose sum is σ = 12909093120. Its totient is φ = 11367143424.

The previous prime is 12120221039. The next prime is 12120221117. The reversal of 12120221101 is 10112202121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12120221101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120221131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24095616 + ... + 24096118.

It is an arithmetic number, because the mean of its divisors is an integer number (403409160).

Almost surely, 2^12120221101 is an apocalyptic number.

It is an amenable number.

12120221101 is a deficient number, since it is larger than the sum of its proper divisors (788872019).

12120221101 is a wasteful number, since it uses less digits than its factorization.

12120221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12120221101 its reverse (10112202121), we get a palindrome (22232423222).

The spelling of 12120221101 in words is "twelve billion, one hundred twenty million, two hundred twenty-one thousand, one hundred one".