21200112120222 has 96 divisors (see below), whose sum is σ = 54633532472064. Its totient is φ = 6035618836800.

The previous prime is 21200112120203. The next prime is 21200112120233. The reversal of 21200112120222 is 22202121100212.

It is a happy number.

21200112120222 is a `hidden beast` number, since 21 + 200 + 11 + 212 + 0 + 222 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21200112120195 and 21200112120204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10132404 + ... + 12044327.

It is an arithmetic number, because the mean of its divisors is an integer number (569099296584).

Almost surely, 2^{21200112120222} is an apocalyptic number.

21200112120222 is an abundant number, since it is smaller than the sum of its proper divisors (33433420351842).

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

21200112120222 is a wasteful number, since it uses less digits than its factorization.

21200112120222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22177036 (or 22177024 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21200112120222 its reverse (22202121100212), we get a palindrome (43402233220434).

The spelling of 21200112120222 in words is "twenty-one trillion, two hundred billion, one hundred twelve million, one hundred twenty thousand, two hundred twenty-two".