22220101111212 has 144 divisors (see below), whose sum is σ = 58140677667072. Its totient is φ = 7149685345920.

The previous prime is 22220101111177. The next prime is 22220101111291. The reversal of 22220101111212 is 21211110102222.

22220101111212 is a `hidden beast` number, since 22 + 220 + 101 + 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 47 ways as a sum of consecutive naturals, for example, 796891023 + ... + 796918905.

Almost surely, 2^{22220101111212} 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 22220101111212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29070338833536).

22220101111212 is an abundant number, since it is smaller than the sum of its proper divisors (35920576555860).

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

22220101111212 is a wasteful number, since it uses less digits than its factorization.

22220101111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32628 (or 32623 counting only the distinct ones).

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

Adding to 22220101111212 its reverse (21211110102222), we get a palindrome (43431211213434).

The spelling of 22220101111212 in words is "twenty-two trillion, two hundred twenty billion, one hundred one million, one hundred eleven thousand, two hundred twelve".