12021211011 has 8 divisors (see below), whose sum is σ = 16130372944. Its totient is φ = 7963094880.

The previous prime is 12021210983. The next prime is 12021211117. The reversal of 12021211011 is 11011212021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12021211011 - 2¹³ = 12021202819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021211511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12760900 + ... + 12761841.

It is an arithmetic number, because the mean of its divisors is an integer number (2016296618).

Almost surely, 2^12021211011 is an apocalyptic number.

12021211011 is a deficient number, since it is larger than the sum of its proper divisors (4109161933).

12021211011 is a wasteful number, since it uses less digits than its factorization.

12021211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25522901.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12021211011 its reverse (11011212021), we get a palindrome (23032423032).

The spelling of 12021211011 in words is "twelve billion, twenty-one million, two hundred eleven thousand, eleven".