20113211111 has 8 divisors (see below), whose sum is σ = 23277496320. Its totient is φ = 17021668248.

The previous prime is 20113211101. The next prime is 20113211117. The reversal of 20113211111 is 11111231102.

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

It is a cyclic number.

It is not a de Polignac number, because 20113211111 - 2¹⁰ = 20113210087 is a prime.

It is a super-2 number, since 2×20113211111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113211117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18184991 + ... + 18186096.

It is an arithmetic number, because the mean of its divisors is an integer number (2909687040).

Almost surely, 2^20113211111 is an apocalyptic number.

20113211111 is a deficient number, since it is larger than the sum of its proper divisors (3164285209).

20113211111 is an equidigital number, since it uses as much as digits as its factorization.

20113211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36371173.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 20113211111 its reverse (11111231102), we get a palindrome (31224442213).

The spelling of 20113211111 in words is "twenty billion, one hundred thirteen million, two hundred eleven thousand, one hundred eleven".