12100331221 has 8 divisors (see below), whose sum is σ = 13201538688. Its totient is φ = 10999320000.

The previous prime is 12100331207. The next prime is 12100331311. The reversal of 12100331221 is 12213300121.

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 12100331221 - 2¹³ = 12100323029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12100331195 and 12100331204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100331921) 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, 99421 + ... + 184621.

It is an arithmetic number, because the mean of its divisors is an integer number (1650192336).

Almost surely, 2^12100331221 is an apocalyptic number.

12100331221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12100331221 is a deficient number, since it is larger than the sum of its proper divisors (1101207467).

12100331221 is a wasteful number, since it uses less digits than its factorization.

12100331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98123.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12100331221 its reverse (12213300121), we get a palindrome (24313631342).

The spelling of 12100331221 in words is "twelve billion, one hundred million, three hundred thirty-one thousand, two hundred twenty-one".