21200201022 has 128 divisors (see below), whose sum is σ = 58468451328. Its totient is φ = 4945536000.

The previous prime is 21200200997. The next prime is 21200201063. The reversal of 21200201022 is 22010200212.

It is a junction number, because it is equal to n+sod(n) for n = 21200200989 and 21200201007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 174522 + ... + 269922.

It is an arithmetic number, because the mean of its divisors is an integer number (456784776).

Almost surely, 2^21200201022 is an apocalyptic number.

21200201022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21200201022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29234225664).

21200201022 is an abundant number, since it is smaller than the sum of its proper divisors (37268250306).

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

21200201022 is a wasteful number, since it uses less digits than its factorization.

21200201022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95474.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21200201022 its reverse (22010200212), we get a palindrome (43210401234).

It can be divided in two parts, 21200 and 201022, that added together give a palindrome (222222).

The spelling of 21200201022 in words is "twenty-one billion, two hundred million, two hundred one thousand, twenty-two".