20122220202111 has 20 divisors (see below), whose sum is σ = 30136391914200. Its totient is φ = 13380328065456.

The previous prime is 20122220202101. The next prime is 20122220202163. The reversal of 20122220202111 is 11120202222102.

It is a happy number.

It is not a de Polignac number, because 20122220202111 - 2¹¹ = 20122220200063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122220202101) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 319277581 + ... + 319340598.

It is an arithmetic number, because the mean of its divisors is an integer number (1506819595710).

Almost surely, 2^{20122220202111} is an apocalyptic number.

20122220202111 is a deficient number, since it is larger than the sum of its proper divisors (10014171712089).

20122220202111 is an equidigital number, since it uses as much as digits as its factorization.

20122220202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638618580 (or 638618571 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20122220202111 its reverse (11120202222102), we get a palindrome (31242422424213).

The spelling of 20122220202111 in words is "twenty trillion, one hundred twenty-two billion, two hundred twenty million, two hundred two thousand, one hundred eleven".