12021544011 has 16 divisors (see below), whose sum is σ = 16172310528. Its totient is φ = 7942881600.

The previous prime is 12021544009. The next prime is 12021544019. The reversal of 12021544011 is 11044512021.

It is not a de Polignac number, because 12021544011 - 2¹ = 12021544009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12021544019) 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, 116575 + ... + 193991.

It is an arithmetic number, because the mean of its divisors is an integer number (1010769408).

Almost surely, 2^12021544011 is an apocalyptic number.

12021544011 is a deficient number, since it is larger than the sum of its proper divisors (4150766517).

12021544011 is a wasteful number, since it uses less digits than its factorization.

12021544011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77882.

The product of its (nonzero) digits is 320, while the sum is 21.

The spelling of 12021544011 in words is "twelve billion, twenty-one million, five hundred forty-four thousand, eleven".