12011022021 has 16 divisors (see below), whose sum is σ = 16441444800. Its totient is φ = 7796280960.

The previous prime is 12011021977. The next prime is 12011022031. The reversal of 12011022021 is 12022011021.

It is not a de Polignac number, because 12011022021 - 2²⁹ = 11474151109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12011021988 and 12011022006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011022031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267496 + ... + 309153.

It is an arithmetic number, because the mean of its divisors is an integer number (1027590300).

Almost surely, 2^12011022021 is an apocalyptic number.

It is an amenable number.

12011022021 is a deficient number, since it is larger than the sum of its proper divisors (4430422779).

12011022021 is a wasteful number, since it uses less digits than its factorization.

12011022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576836.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12011022021 its reverse (12022011021), we get a palindrome (24033033042).

It can be divided in two parts, 1201 and 1022021, that multiplied together give a palindrome (1227447221).

The spelling of 12011022021 in words is "twelve billion, eleven million, twenty-two thousand, twenty-one".