21112222122200 has 192 divisors, whose sum is σ = 54111805596000. Its totient is φ = 7596472320000.

The previous prime is 21112222122193. The next prime is 21112222122253. The reversal of 21112222122200 is 222122221112.

It is a super-2 number, since 2×21112222122200² (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 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, 370823336 + ... + 370880264.

Almost surely, 2^{21112222122200} is an apocalyptic number.

21112222122200 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 21112222122200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27055902798000).

21112222122200 is an abundant number, since it is smaller than the sum of its proper divisors (32999583473800).

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

21112222122200 is a wasteful number, since it uses less digits than its factorization.

21112222122200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58726 (or 58717 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21112222122200 its reverse (222122221112), we get a palindrome (21334344343312).

It can be divided in two parts, 211122 and 22122200, that added together give a palindrome (22333322).

The spelling of 21112222122200 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred".