12011202211221 has 24 divisors (see below), whose sum is σ = 17381452121280. Its totient is φ = 7992729452736.

The previous prime is 12011202211219. The next prime is 12011202211237. The reversal of 12011202211221 is 12211220211021.

12011202211221 is a `hidden beast` number, since 1 + 20 + 11 + 202 + 211 + 221 = 666.

It is not a de Polignac number, because 12011202211221 - 2¹ = 12011202211219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12011202211194 and 12011202211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011202211241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88589560 + ... + 88725038.

It is an arithmetic number, because the mean of its divisors is an integer number (724227171720).

Almost surely, 2^{12011202211221} is an apocalyptic number.

It is an amenable number.

12011202211221 is a deficient number, since it is larger than the sum of its proper divisors (5370249910059).

12011202211221 is a wasteful number, since it uses less digits than its factorization.

12011202211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153545 (or 153542 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12011202211221 its reverse (12211220211021), we get a palindrome (24222422422242).

The spelling of 12011202211221 in words is "twelve trillion, eleven billion, two hundred two million, two hundred eleven thousand, two hundred twenty-one".