20101111320 has 32 divisors (see below), whose sum is σ = 60303334320. Its totient is φ = 5360296320.

The previous prime is 20101111319. The next prime is 20101111343. The reversal of 20101111320 is 2311110102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20101111296 and 20101111305.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83754511 + ... + 83754750.

Almost surely, 2^20101111320 is an apocalyptic number.

20101111320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101111320 is an abundant number, since it is smaller than the sum of its proper divisors (40202223000).

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

20101111320 is a wasteful number, since it uses less digits than its factorization.

20101111320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167509275 (or 167509271 counting only the distinct ones).

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

Adding to 20101111320 its reverse (2311110102), we get a palindrome (22412221422).

The spelling of 20101111320 in words is "twenty billion, one hundred one million, one hundred eleven thousand, three hundred twenty".