12011012322221 has 4 divisors (see below), whose sum is σ = 13102922533344. Its totient is φ = 10919102111100.

The previous prime is 12011012322157. The next prime is 12011012322223. The reversal of 12011012322221 is 12222321011021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12011012322221 - 2⁶ = 12011012322157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011012322193 and 12011012322202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011012322223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545955105545 + ... + 545955105566.

It is an arithmetic number, because the mean of its divisors is an integer number (3275730633336).

Almost surely, 2^{12011012322221} is an apocalyptic number.

12011012322221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12011012322221 is a deficient number, since it is larger than the sum of its proper divisors (1091910211123).

12011012322221 is a wasteful number, since it uses less digits than its factorization.

12011012322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091910211122.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 12011012322221 its reverse (12222321011021), we get a palindrome (24233333333242).

The spelling of 12011012322221 in words is "twelve trillion, eleven billion, twelve million, three hundred twenty-two thousand, two hundred twenty-one".