12311100221 has 32 divisors (see below), whose sum is σ = 14834147328. Its totient is φ = 9989242560.

The previous prime is 12311100211. The next prime is 12311100229. The reversal of 12311100221 is 12200111321.

It is a cyclic number.

It is not a de Polignac number, because 12311100221 - 2¹⁰ = 12311099197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12311100196 and 12311100205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311100229) 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, 7070411 + ... + 7072151.

It is an arithmetic number, because the mean of its divisors is an integer number (463567104).

Almost surely, 2^12311100221 is an apocalyptic number.

It is an amenable number.

12311100221 is a deficient number, since it is larger than the sum of its proper divisors (2523047107).

12311100221 is a wasteful number, since it uses less digits than its factorization.

12311100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12311100221 its reverse (12200111321), we get a palindrome (24511211542).

It can be divided in two parts, 12311100 and 221, that added together give a palindrome (12311321).

The spelling of 12311100221 in words is "twelve billion, three hundred eleven million, one hundred thousand, two hundred twenty-one".