21120120001120 has 48 divisors (see below), whose sum is σ = 57024324006048. Its totient is φ = 7241184000000.

The previous prime is 21120120001111. The next prime is 21120120001129. The reversal of 21120120001120 is 2110002102112.

It is an interprime number because it is at equal distance from previous prime (21120120001111) and next prime (21120120001129).

It is a self number, because there is not a number n which added to its sum of digits gives 21120120001120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120120001129) 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, 9428623881 + ... + 9428626120.

It is an arithmetic number, because the mean of its divisors is an integer number (1188006750126).

Almost surely, 2^{21120120001120} is an apocalyptic number.

21120120001120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120120001120 is an abundant number, since it is smaller than the sum of its proper divisors (35904204004928).

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

21120120001120 is a wasteful number, since it uses less digits than its factorization.

21120120001120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18857250023 (or 18857250015 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21120120001120 its reverse (2110002102112), we get a palindrome (23230122103232).

The spelling of 21120120001120 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty million, one thousand, one hundred twenty".