21022020020200 has 48 divisors (see below), whose sum is σ = 49308729312780. Its totient is φ = 8334393768960.

The previous prime is 21022020020171. The next prime is 21022020020249. The reversal of 21022020020200 is 202002022012.

It can be written as a sum of positive squares in 6 ways, for example, as 3476158886916 + 17545861133284 = 1864446^2 + 4188778^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 465066339 + ... + 465111538.

Almost surely, 2^{21022020020200} is an apocalyptic number.

21022020020200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022020020200 is an abundant number, since it is smaller than the sum of its proper divisors (28286709292580).

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

21022020020200 is a wasteful number, since it uses less digits than its factorization.

21022020020200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930178006 (or 930177997 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 21022020020200 its reverse (202002022012), we get a palindrome (21224022042212).

The spelling of 21022020020200 in words is "twenty-one trillion, twenty-two billion, twenty million, twenty thousand, two hundred".