20012012220111 has 4 divisors (see below), whose sum is σ = 26682682960152. Its totient is φ = 13341341480072.

The previous prime is 20012012220077. The next prime is 20012012220181. The reversal of 20012012220111 is 11102221021002.

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 20012012220111 - 2¹¹ = 20012012218063 is a prime.

It is a super-2 number, since 2×20012012220111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012012220181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3335335370016 + ... + 3335335370021.

It is an arithmetic number, because the mean of its divisors is an integer number (6670670740038).

Almost surely, 2^{20012012220111} is an apocalyptic number.

20012012220111 is a deficient number, since it is larger than the sum of its proper divisors (6670670740041).

20012012220111 is an equidigital number, since it uses as much as digits as its factorization.

20012012220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6670670740040.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20012012220111 its reverse (11102221021002), we get a palindrome (31114233241113).

The spelling of 20012012220111 in words is "twenty trillion, twelve billion, twelve million, two hundred twenty thousand, one hundred eleven".