20122200111111 has 32 divisors (see below), whose sum is σ = 31107700216320. Its totient is φ = 11332089990144.

The previous prime is 20122200111107. The next prime is 20122200111119. The reversal of 20122200111111 is 11111100222102.

It is a happy number.

It is not a de Polignac number, because 20122200111111 - 2² = 20122200111107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122200111119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13400290 + ... + 14826063.

It is an arithmetic number, because the mean of its divisors is an integer number (972115631760).

Almost surely, 2^{20122200111111} is an apocalyptic number.

20122200111111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20122200111111 is a deficient number, since it is larger than the sum of its proper divisors (10985500105209).

20122200111111 is a wasteful number, since it uses less digits than its factorization.

20122200111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28226855.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20122200111111 its reverse (11111100222102), we get a palindrome (31233300333213).

The spelling of 20122200111111 in words is "twenty trillion, one hundred twenty-two billion, two hundred million, one hundred eleven thousand, one hundred eleven".