21122321220200 has 24 divisors (see below), whose sum is σ = 49109396837430. Its totient is φ = 8448928488000.

The previous prime is 21122321220199. The next prime is 21122321220211. The reversal of 21122321220200 is 202212322112.

It can be written as a sum of positive squares in 3 ways, for example, as 12975715161124 + 8146606059076 = 3602182^2 + 2854226^2 .

It is a super-2 number, since 2×21122321220200² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52805802851 + ... + 52805803250.

Almost surely, 2^{21122321220200} is an apocalyptic number.

21122321220200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122321220200 is an abundant number, since it is smaller than the sum of its proper divisors (27987075617230).

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

21122321220200 is a wasteful number, since it uses less digits than its factorization.

21122321220200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105611606117 (or 105611606108 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21122321220200 its reverse (202212322112), we get a palindrome (21324533542312).

The spelling of 21122321220200 in words is "twenty-one trillion, one hundred twenty-two billion, three hundred twenty-one million, two hundred twenty thousand, two hundred".