21120220101120 has 160 divisors (see below), whose sum is σ = 77164232923008. Its totient is φ = 4827478867968.

The previous prime is 21120220101077. The next prime is 21120220101131. The reversal of 21120220101120 is 2110102202112.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21120220101120.

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 15 ways as a sum of consecutive naturals, for example, 196376859 + ... + 196484378.

Almost surely, 2^{21120220101120} is an apocalyptic number.

21120220101120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120220101120 is an abundant number, since it is smaller than the sum of its proper divisors (56044012821888).

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

21120220101120 is an equidigital number, since it uses as much as digits as its factorization.

21120220101120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392861270 (or 392861254 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21120220101120 its reverse (2110102202112), we get a palindrome (23230322303232).

The spelling of 21120220101120 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty million, one hundred one thousand, one hundred twenty".