21002022200120 has 128 divisors (see below), whose sum is σ = 54245987712000. Its totient is φ = 7253462960640.

The previous prime is 21002022200111. The next prime is 21002022200129. The reversal of 21002022200120 is 2100222020012.

It is an interprime number because it is at equal distance from previous prime (21002022200111) and next prime (21002022200129).

It is a junction number, because it is equal to n+sod(n) for n = 21002022200095 and 21002022200104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002022200129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12673346 + ... + 14234385.

It is an arithmetic number, because the mean of its divisors is an integer number (423796779000).

Almost surely, 2^{21002022200120} is an apocalyptic number.

21002022200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002022200120 is an abundant number, since it is smaller than the sum of its proper divisors (33243965511880).

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

21002022200120 is a wasteful number, since it uses less digits than its factorization.

21002022200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26907853 (or 26907849 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21002022200120 its reverse (2100222020012), we get a palindrome (23102244220132).

The spelling of 21002022200120 in words is "twenty-one trillion, two billion, twenty-two million, two hundred thousand, one hundred twenty".