21220101111120 has 80 divisors (see below), whose sum is σ = 65802135834240. Its totient is φ = 5656988477952.

The previous prime is 21220101111103. The next prime is 21220101111199. The reversal of 21220101111120 is 2111110102212.

It is a happy number.

21220101111120 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

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 21220101111120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12523279 + ... + 14116398.

It is an arithmetic number, because the mean of its divisors is an integer number (822526697928).

Almost surely, 2^{21220101111120} is an apocalyptic number.

21220101111120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220101111120 is an abundant number, since it is smaller than the sum of its proper divisors (44582034723120).

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

21220101111120 is a wasteful number, since it uses less digits than its factorization.

21220101111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26643012 (or 26643006 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21220101111120 its reverse (2111110102212), we get a palindrome (23331211213332).

The spelling of 21220101111120 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, one hundred eleven thousand, one hundred twenty".