12020021211 has 32 divisors (see below), whose sum is σ = 18067610880. Its totient is φ = 7044912000.

The previous prime is 12020021203. The next prime is 12020021231. The reversal of 12020021211 is 11212002021.

It is not a de Polignac number, because 12020021211 - 2³ = 12020021203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12020021201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101385 + ... + 185253.

It is an arithmetic number, because the mean of its divisors is an integer number (564612840).

Almost surely, 2^12020021211 is an apocalyptic number.

12020021211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12020021211 is a deficient number, since it is larger than the sum of its proper divisors (6047589669).

12020021211 is a wasteful number, since it uses less digits than its factorization.

12020021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84027.

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

Adding to 12020021211 its reverse (11212002021), we get a palindrome (23232023232).

The spelling of 12020021211 in words is "twelve billion, twenty million, twenty-one thousand, two hundred eleven".