12021221012011 has 4 divisors (see below), whose sum is σ = 12081629158000. Its totient is φ = 11960812866024.

The previous prime is 12021221011991. The next prime is 12021221012089. The reversal of 12021221012011 is 11021012212021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12021221012011 - 2¹⁹ = 12021220487723 is a prime.

It is a super-2 number, since 2×12021221012011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021228012011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30204072696 + ... + 30204073093.

It is an arithmetic number, because the mean of its divisors is an integer number (3020407289500).

Almost surely, 2^{12021221012011} is an apocalyptic number.

12021221012011 is a deficient number, since it is larger than the sum of its proper divisors (60408145989).

12021221012011 is an equidigital number, since it uses as much as digits as its factorization.

12021221012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60408145988.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12021221012011 its reverse (11021012212021), we get a palindrome (23042233224032).

The spelling of 12021221012011 in words is "twelve trillion, twenty-one billion, two hundred twenty-one million, twelve thousand, eleven".