21120220201120 has 24 divisors (see below), whose sum is σ = 49896520225524. Its totient is φ = 8448088080384.

The previous prime is 21120220201117. The next prime is 21120220201153. The reversal of 21120220201120 is 2110202202112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20489854071184 + 630366129936 = 4526572^2 + 793956^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 21120220201094 and 21120220201103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66000687969 + ... + 66000688288.

Almost surely, 2^{21120220201120} is an apocalyptic number.

21120220201120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120220201120 is an abundant number, since it is smaller than the sum of its proper divisors (28776300024404).

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

21120220201120 is a wasteful number, since it uses less digits than its factorization.

21120220201120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132001376272 (or 132001376264 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21120220201120 its reverse (2110202202112), we get a palindrome (23230422403232).

The spelling of 21120220201120 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty million, two hundred one thousand, one hundred twenty".