20111131103223 has 8 divisors (see below), whose sum is σ = 27215062985728. Its totient is φ = 13207309978104.

The previous prime is 20111131103183. The next prime is 20111131103237. The reversal of 20111131103223 is 32230113111102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20111131103223 - 2¹⁶ = 20111131037687 is a prime.

It is a super-2 number, since 2×20111131103223² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20111131103223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111131103023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50027689111 + ... + 50027689512.

It is an arithmetic number, because the mean of its divisors is an integer number (3401882873216).

Almost surely, 2^{20111131103223} is an apocalyptic number.

20111131103223 is a deficient number, since it is larger than the sum of its proper divisors (7103931882505).

20111131103223 is a wasteful number, since it uses less digits than its factorization.

20111131103223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100055378693.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 20111131103223 its reverse (32230113111102), we get a palindrome (52341244214325).

The spelling of 20111131103223 in words is "twenty trillion, one hundred eleven billion, one hundred thirty-one million, one hundred three thousand, two hundred twenty-three".