21200011120 has 40 divisors (see below), whose sum is σ = 49297072464. Its totient is φ = 8478792192.

The previous prime is 21200011117. The next prime is 21200011139. The reversal of 21200011120 is 2111000212.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 21200011097 and 21200011106.

It is a congruent number.

It is an unprimeable number.

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, 726247 + ... + 754873.

Almost surely, 2^21200011120 is an apocalyptic number.

21200011120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200011120 is an abundant number, since it is smaller than the sum of its proper divisors (28097061344).

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

21200011120 is a wasteful number, since it uses less digits than its factorization.

21200011120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37897 (or 37891 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21200011120 its reverse (2111000212), we get a palindrome (23311011332).

The spelling of 21200011120 in words is "twenty-one billion, two hundred million, eleven thousand, one hundred twenty".