22211011111212 has 192 divisors, whose sum is σ = 71845954145280. Its totient is φ = 5764851993600.

The previous prime is 22211011111207. The next prime is 22211011111249. The reversal of 22211011111212 is 21211111011222.

It is a happy number.

22211011111212 is a `hidden beast` number, since 222 + 110 + 11 + 111 + 212 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10336858 + ... + 12299294.

It is an arithmetic number, because the mean of its divisors is an integer number (374197677840).

Almost surely, 2^{22211011111212} is an apocalyptic number.

22211011111212 is a gapful number since it is divisible by the number (22) 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 22211011111212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35922977072640).

22211011111212 is an abundant number, since it is smaller than the sum of its proper divisors (49634943034068).

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

22211011111212 is a wasteful number, since it uses less digits than its factorization.

22211011111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963829 (or 1963821 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 22211011111212 its reverse (21211111011222), we get a palindrome (43422122122434).

The spelling of 22211011111212 in words is "twenty-two trillion, two hundred eleven billion, eleven million, one hundred eleven thousand, two hundred twelve".