21022001110020 has 48 divisors (see below), whose sum is σ = 58956694655040. Its totient is φ = 5596810624896.

The previous prime is 21022001110009. The next prime is 21022001110027. The reversal of 21022001110020 is 2001110022012.

It is a super-2 number, since 2×21022001110020² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 21022001109978 and 21022001110005.

It is not an unprimeable number, because it can be changed into a prime (21022001110027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282973107 + ... + 283047386.

It is an arithmetic number, because the mean of its divisors is an integer number (1228264471980).

Almost surely, 2^{21022001110020} is an apocalyptic number.

21022001110020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022001110020 is an abundant number, since it is smaller than the sum of its proper divisors (37934693545020).

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

21022001110020 is a wasteful number, since it uses less digits than its factorization.

21022001110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566021124 (or 566021122 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21022001110020 its reverse (2001110022012), we get a palindrome (23023111132032).

The spelling of 21022001110020 in words is "twenty-one trillion, twenty-two billion, one million, one hundred ten thousand, twenty".