11900111110020 has 72 divisors (see below), whose sum is σ = 41253718519104. Its totient is φ = 2720025396288.

The previous prime is 11900111110009. The next prime is 11900111110021. The reversal of 11900111110020 is 2001111100911.

It is a super-2 number, since 2×11900111110020² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11900111109975 and 11900111110002.

It is not an unprimeable number, because it can be changed into a prime (11900111110021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4722265054 + ... + 4722267573.

Almost surely, 2^{11900111110020} is an apocalyptic number.

11900111110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11900111110020 is an abundant number, since it is smaller than the sum of its proper divisors (29353607409084).

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

11900111110020 is a wasteful number, since it uses less digits than its factorization.

11900111110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9444532649 (or 9444532644 counting only the distinct ones).

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

Adding to 11900111110020 its reverse (2001111100911), we get a palindrome (13901222210931).

The spelling of 11900111110020 in words is "eleven trillion, nine hundred billion, one hundred eleven million, one hundred ten thousand, twenty".