12020220011 has 4 divisors (see below), whose sum is σ = 12050196024. Its totient is φ = 11990244000.

The previous prime is 12020220001. The next prime is 12020220029. The reversal of 12020220011 is 11002202021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11002202021 = 13757 ⋅799753.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12020220011 is a prime.

It is a super-2 number, since 2×12020220011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020219974 and 12020220001.

It is not an unprimeable number, because it can be changed into a prime (12020220001) 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, 14987405 + ... + 14988206.

It is an arithmetic number, because the mean of its divisors is an integer number (3012549006).

Almost surely, 2^12020220011 is an apocalyptic number.

12020220011 is a deficient number, since it is larger than the sum of its proper divisors (29976013).

12020220011 is an equidigital number, since it uses as much as digits as its factorization.

12020220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29976012.

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

Adding to 12020220011 its reverse (11002202021), we get a palindrome (23022422032).

The spelling of 12020220011 in words is "twelve billion, twenty million, two hundred twenty thousand, eleven".