20110123201311 has 48 divisors (see below), whose sum is σ = 34428272310432. Its totient is φ = 11150857267200.

The previous prime is 20110123201283. The next prime is 20110123201313. The reversal of 20110123201311 is 11310232101102.

20110123201311 is a `hidden beast` number, since 20 + 1 + 1 + 0 + 12 + 320 + 1 + 311 = 666.

It is not a de Polignac number, because 20110123201311 - 2¹¹ = 20110123199263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110123201313) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68994310 + ... + 69285171.

It is an arithmetic number, because the mean of its divisors is an integer number (717255673134).

Almost surely, 2^{20110123201311} is an apocalyptic number.

20110123201311 is a deficient number, since it is larger than the sum of its proper divisors (14318149109121).

20110123201311 is a wasteful number, since it uses less digits than its factorization.

20110123201311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138279624 (or 138279621 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 20110123201311 its reverse (11310232101102), we get a palindrome (31420355302413).

The spelling of 20110123201311 in words is "twenty trillion, one hundred ten billion, one hundred twenty-three million, two hundred one thousand, three hundred eleven".