12020022011 has 4 divisors (see below), whose sum is σ = 12041147400. Its totient is φ = 11998896624.

The previous prime is 12020021963. The next prime is 12020022031. The reversal of 12020022011 is 11022002021.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12020022011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020021983 and 12020022001.

It is not an unprimeable number, because it can be changed into a prime (12020022031) 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, 10561841 + ... + 10562978.

It is an arithmetic number, because the mean of its divisors is an integer number (3010286850).

Almost surely, 2^12020022011 is an apocalyptic number.

12020022011 is a deficient number, since it is larger than the sum of its proper divisors (21125389).

12020022011 is an equidigital number, since it uses as much as digits as its factorization.

12020022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21125388.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12020022011 its reverse (11022002021), we get a palindrome (23042024032).

The spelling of 12020022011 in words is "twelve billion, twenty million, twenty-two thousand, eleven".