22111221210210 has 192 divisors, whose sum is σ = 63785185551360. Its totient is φ = 5268886093440.

The previous prime is 22111221210187. The next prime is 22111221210233. The reversal of 22111221210210 is 1201212211122.

22111221210210 is a `hidden beast` number, since 2 + 21 + 1 + 1 + 221 + 210 + 210 = 666.

It is an interprime number because it is at equal distance from previous prime (22111221210187) and next prime (22111221210233).

It is a super-2 number, since 2×22111221210210² (a number of 27 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 892901289 + ... + 892926051.

It is an arithmetic number, because the mean of its divisors is an integer number (332214508080).

Almost surely, 2^{22111221210210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22111221210210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31892592775680).

22111221210210 is an abundant number, since it is smaller than the sum of its proper divisors (41673964341150).

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

22111221210210 is a wasteful number, since it uses less digits than its factorization.

22111221210210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40133 (or 40130 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22111221210210 its reverse (1201212211122), we get a palindrome (23312433421332).

The spelling of 22111221210210 in words is "twenty-two trillion, one hundred eleven billion, two hundred twenty-one million, two hundred ten thousand, two hundred ten".