21220112012020 has 48 divisors (see below), whose sum is σ = 49235001596928. Its totient is φ = 7641411176960.

The previous prime is 21220112011993. The next prime is 21220112012059. The reversal of 21220112012020 is 2021021102212.

It is a happy number.

21220112012020 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 21220112011985 and 21220112012003.

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, 1356776836 + ... + 1356792475.

It is an arithmetic number, because the mean of its divisors is an integer number (1025729199936).

Almost surely, 2^{21220112012020} is an apocalyptic number.

21220112012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220112012020 is an abundant number, since it is smaller than the sum of its proper divisors (28014889584908).

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

21220112012020 is a wasteful number, since it uses less digits than its factorization.

21220112012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713569360 (or 2713569358 counting only the distinct ones).

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

Adding to 21220112012020 its reverse (2021021102212), we get a palindrome (23241133114232).

The spelling of 21220112012020 in words is "twenty-one trillion, two hundred twenty billion, one hundred twelve million, twelve thousand, twenty".