22112112001212 has 96 divisors (see below), whose sum is σ = 58044104778240. Its totient is φ = 7369604455536.

The previous prime is 22112112001211. The next prime is 22112112001247. The reversal of 22112112001212 is 21210021121122.

22112112001212 is a `hidden beast` number, since 221 + 1 + 211 + 20 + 0 + 1 + 212 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112112001211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59537473 + ... + 59907719.

It is an arithmetic number, because the mean of its divisors is an integer number (604626091440).

Almost surely, 2^{22112112001212} 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 22112112001212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29022052389120).

22112112001212 is an abundant number, since it is smaller than the sum of its proper divisors (35931992777028).

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

22112112001212 is an equidigital number, since it uses as much as digits as its factorization.

22112112001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377099 (or 377079 counting only the distinct ones).

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

Adding to 22112112001212 its reverse (21210021121122), we get a palindrome (43322133122334).

The spelling of 22112112001212 in words is "twenty-two trillion, one hundred twelve billion, one hundred twelve million, one thousand, two hundred twelve".