21222012202200 has 288 divisors, whose sum is σ = 71835849867600. Its totient is φ = 5614468992000.

The previous prime is 21222012202187. The next prime is 21222012202213. The reversal of 21222012202200 is 220221022212.

21222012202200 is a `hidden beast` number, since 2 + 1 + 2 + 220 + 1 + 220 + 220 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (21222012202187) and next prime (21222012202213).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 136432470 + ... + 136587930.

Almost surely, 2^{21222012202200} is an apocalyptic number.

21222012202200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21222012202200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35917924933800).

21222012202200 is an abundant number, since it is smaller than the sum of its proper divisors (50613837665400).

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

21222012202200 is a wasteful number, since it uses less digits than its factorization.

21222012202200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156083 (or 156071 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21222012202200 its reverse (220221022212), we get a palindrome (21442233224412).

The spelling of 21222012202200 in words is "twenty-one trillion, two hundred twenty-two billion, twelve million, two hundred two thousand, two hundred".