12021200011111 has 16 divisors (see below), whose sum is σ = 12467211837696. Its totient is φ = 11583313560000.

The previous prime is 12021200011103. The next prime is 12021200011147. The reversal of 12021200011111 is 11111000212021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12021200011111 - 2³ = 12021200011103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021200011091 and 12021200011100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021200011181) 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, 4170435 + ... + 6436996.

It is an arithmetic number, because the mean of its divisors is an integer number (779200739856).

Almost surely, 2^{12021200011111} is an apocalyptic number.

12021200011111 is a deficient number, since it is larger than the sum of its proper divisors (446011826585).

12021200011111 is a wasteful number, since it uses less digits than its factorization.

12021200011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10607814.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12021200011111 its reverse (11111000212021), we get a palindrome (23132200223132).

The spelling of 12021200011111 in words is "twelve trillion, twenty-one billion, two hundred million, eleven thousand, one hundred eleven".