23111201211320 has 64 divisors (see below), whose sum is σ = 53685231667200. Its totient is φ = 8945004263040.

The previous prime is 23111201211313. The next prime is 23111201211323. The reversal of 23111201211320 is 2311210211132.

It is a super-2 number, since 2×23111201211320² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23111201211292 and 23111201211301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23111201211323) 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, 7461527 + ... + 10094393.

It is an arithmetic number, because the mean of its divisors is an integer number (838831744800).

Almost surely, 2^{23111201211320} is an apocalyptic number.

23111201211320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23111201211320 is an abundant number, since it is smaller than the sum of its proper divisors (30574030455880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23111201211320 is a wasteful number, since it uses less digits than its factorization.

23111201211320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639988 (or 2639984 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 23111201211320 its reverse (2311210211132), we get a palindrome (25422411422452).

The spelling of 23111201211320 in words is "twenty-three trillion, one hundred eleven billion, two hundred one million, two hundred eleven thousand, three hundred twenty".