12120011012221 has 16 divisors (see below), whose sum is σ = 13895699837824. Its totient is φ = 10355422169664.

The previous prime is 12120011012203. The next prime is 12120011012257. The reversal of 12120011012221 is 12221011002121.

It is a cyclic number.

It is not a de Polignac number, because 12120011012221 - 2¹³ = 12120011004029 is a prime.

It is a super-2 number, since 2×12120011012221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12120011012195 and 12120011012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120011012261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2650831 + ... + 5591683.

It is an arithmetic number, because the mean of its divisors is an integer number (868481239864).

Almost surely, 2^{12120011012221} is an apocalyptic number.

It is an amenable number.

12120011012221 is a deficient number, since it is larger than the sum of its proper divisors (1775688825603).

12120011012221 is a wasteful number, since it uses less digits than its factorization.

12120011012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2942740.

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

Adding to 12120011012221 its reverse (12221011002121), we get a palindrome (24341022014342).

It can be divided in two parts, 1212001 and 1012221, that added together give a palindrome (2224222).

The spelling of 12120011012221 in words is "twelve trillion, one hundred twenty billion, eleven million, twelve thousand, two hundred twenty-one".