22011011221212 has 108 divisors (see below), whose sum is σ = 60254555516064. Its totient is φ = 6771891859200.

The previous prime is 22011011221207. The next prime is 22011011221223. The reversal of 22011011221212 is 21212211011022.

22011011221212 is a `hidden beast` number, since 220 + 1 + 1 + 0 + 11 + 221 + 212 = 666.

It is a super-2 number, since 2×22011011221212² (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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 57918888 + ... + 58297680.

Almost surely, 2^{22011011221212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22011011221212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30127277758032).

22011011221212 is an abundant number, since it is smaller than the sum of its proper divisors (38243544294852).

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

22011011221212 is a wasteful number, since it uses less digits than its factorization.

22011011221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388380 (or 388362 counting only the distinct ones).

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

Adding to 22011011221212 its reverse (21212211011022), we get a palindrome (43223222232234).

The spelling of 22011011221212 in words is "twenty-two trillion, eleven billion, eleven million, two hundred twenty-one thousand, two hundred twelve".