12011011012221 has 16 divisors (see below), whose sum is σ = 17246650915200. Its totient is φ = 7391360963520.

The previous prime is 12011011012201. The next prime is 12011011012237. The reversal of 12011011012221 is 12221011011021.

It is a happy number.

It is not a de Polignac number, because 12011011012221 - 2²² = 12011006817917 is a prime.

It is a super-2 number, since 2×12011011012221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12011011012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011011012201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12302755 + ... + 13243103.

It is an arithmetic number, because the mean of its divisors is an integer number (1077915682200).

Almost surely, 2^{12011011012221} is an apocalyptic number.

It is an amenable number.

12011011012221 is a deficient number, since it is larger than the sum of its proper divisors (5235639902979).

12011011012221 is a wasteful number, since it uses less digits than its factorization.

12011011012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267876.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12011011012221 its reverse (12221011011021), we get a palindrome (24232022023242).

The spelling of 12011011012221 in words is "twelve trillion, eleven billion, eleven million, twelve thousand, two hundred twenty-one".