20023211121111 has 16 divisors (see below), whose sum is σ = 32360745246720. Its totient is φ = 12135279467160.

The previous prime is 20023211121047. The next prime is 20023211121127. The reversal of 20023211121111 is 11112111232002.

It is a happy number.

20023211121111 is a `hidden beast` number, since 200 + 2 + 321 + 11 + 21 + 111 = 666.

It is not a de Polignac number, because 20023211121111 - 2⁶ = 20023211121047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023211131111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33709109335 + ... + 33709109928.

It is an arithmetic number, because the mean of its divisors is an integer number (2022546577920).

Almost surely, 2^{20023211121111} is an apocalyptic number.

20023211121111 is a deficient number, since it is larger than the sum of its proper divisors (12337534125609).

20023211121111 is a wasteful number, since it uses less digits than its factorization.

20023211121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67418219283 (or 67418219277 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 20023211121111 its reverse (11112111232002), we get a palindrome (31135322353113).

The spelling of 20023211121111 in words is "twenty trillion, twenty-three billion, two hundred eleven million, one hundred twenty-one thousand, one hundred eleven".