12021211021 has 8 divisors (see below), whose sum is σ = 12349792224. Its totient is φ = 11694858000.

The previous prime is 12021210983. The next prime is 12021211117. The reversal of 12021211021 is 12011212021.

12021211021 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 12021211021 - 2⁷ = 12021210893 is a prime.

It is a super-2 number, since 2×12021211021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021210992 and 12021211010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021211121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546106 + ... + 567691.

It is an arithmetic number, because the mean of its divisors is an integer number (1543724028).

Almost surely, 2^12021211021 is an apocalyptic number.

It is an amenable number.

12021211021 is a deficient number, since it is larger than the sum of its proper divisors (328581203).

12021211021 is a wasteful number, since it uses less digits than its factorization.

12021211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114091.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12021211021 its reverse (12011212021), we get a palindrome (24032423042).

The spelling of 12021211021 in words is "twelve billion, twenty-one million, two hundred eleven thousand, twenty-one".