20010220122111 has 16 divisors (see below), whose sum is σ = 27629504268288. Its totient is φ = 12868308741600.

The previous prime is 20010220122103. The next prime is 20010220122187. The reversal of 20010220122111 is 11122102201002.

It is not a de Polignac number, because 20010220122111 - 2³ = 20010220122103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010220122311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345893356 + ... + 345951201.

It is an arithmetic number, because the mean of its divisors is an integer number (1726844016768).

Almost surely, 2^{20010220122111} is an apocalyptic number.

20010220122111 is a deficient number, since it is larger than the sum of its proper divisors (7619284146177).

20010220122111 is a wasteful number, since it uses less digits than its factorization.

20010220122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691844902.

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

Adding to 20010220122111 its reverse (11122102201002), we get a palindrome (31132322323113).

The spelling of 20010220122111 in words is "twenty trillion, ten billion, two hundred twenty million, one hundred twenty-two thousand, one hundred eleven".