12100202111221 has 12 divisors (see below), whose sum is σ = 14079326240640. Its totient is φ = 10368963231480.

The previous prime is 12100202111147. The next prime is 12100202111267. The reversal of 12100202111221 is 12211120200121.

It is not a de Polignac number, because 12100202111221 - 2¹¹ = 12100202109173 is a prime.

It is a super-2 number, since 2×12100202111221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12100202111195 and 12100202111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100202111521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31217061 + ... + 31602298.

It is an arithmetic number, because the mean of its divisors is an integer number (1173277186720).

Almost surely, 2^{12100202111221} is an apocalyptic number.

It is an amenable number.

12100202111221 is a deficient number, since it is larger than the sum of its proper divisors (1979124129419).

12100202111221 is an equidigital number, since it uses as much as digits as its factorization.

12100202111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62823304 (or 62823297 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12100202111221 its reverse (12211120200121), we get a palindrome (24311322311342).

The spelling of 12100202111221 in words is "twelve trillion, one hundred billion, two hundred two million, one hundred eleven thousand, two hundred twenty-one".