12011102021 has 16 divisors (see below), whose sum is σ = 13457518848. Its totient is φ = 10660742400.

The previous prime is 12011102009. The next prime is 12011102071. The reversal of 12011102021 is 12020111021.

It is a cyclic number.

It is not a de Polignac number, because 12011102021 - 2⁶ = 12011101957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12011101993 and 12011102011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011102071) 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, 188570 + ... + 244091.

It is an arithmetic number, because the mean of its divisors is an integer number (841094928).

Almost surely, 2^12011102021 is an apocalyptic number.

It is an amenable number.

12011102021 is a deficient number, since it is larger than the sum of its proper divisors (1446416827).

12011102021 is a wasteful number, since it uses less digits than its factorization.

12011102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432772.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12011102021 its reverse (12020111021), we get a palindrome (24031213042).

The spelling of 12011102021 in words is "twelve billion, eleven million, one hundred two thousand, twenty-one".