12111221201021 has 8 divisors (see below), whose sum is σ = 12638158151424. Its totient is φ = 11584314426960.

The previous prime is 12111221200997. The next prime is 12111221201077. The reversal of 12111221201021 is 12010212211121.

12111221201021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12111221201021 - 2²⁶ = 12111154092157 is a prime.

It is a super-3 number, since 3×12111221201021³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111221291021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6722021 + ... + 8331146.

It is an arithmetic number, because the mean of its divisors is an integer number (1579769768928).

Almost surely, 2^{12111221201021} is an apocalyptic number.

It is an amenable number.

12111221201021 is a deficient number, since it is larger than the sum of its proper divisors (526936950403).

12111221201021 is a wasteful number, since it uses less digits than its factorization.

12111221201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15088171.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12111221201021 its reverse (12010212211121), we get a palindrome (24121433412142).

The spelling of 12111221201021 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-one million, two hundred one thousand, twenty-one".