20110211211123 has 20 divisors (see below), whose sum is σ = 32772196049208. Its totient is φ = 12188006794080.

The previous prime is 20110211211023. The next prime is 20110211211187. The reversal of 20110211211123 is 32111211201102.

It is a happy number.

It is not a de Polignac number, because 20110211211123 - 2¹⁰ = 20110211210099 is a prime.

It is a super-2 number, since 2×20110211211123² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20110211211096 and 20110211211105.

It is not an unprimeable number, because it can be changed into a prime (20110211211023) 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, 11285190586 + ... + 11285192367.

Almost surely, 2^{20110211211123} is an apocalyptic number.

20110211211123 is a deficient number, since it is larger than the sum of its proper divisors (12661984838085).

20110211211123 is a wasteful number, since it uses less digits than its factorization.

20110211211123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22570382976 (or 22570382967 counting only the distinct ones).

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

Adding to 20110211211123 its reverse (32111211201102), we get a palindrome (52221422412225).

The spelling of 20110211211123 in words is "twenty trillion, one hundred ten billion, two hundred eleven million, two hundred eleven thousand, one hundred twenty-three".