22120100011212 has 96 divisors (see below), whose sum is σ = 59883942117888. Its totient is φ = 6223972829184.

The previous prime is 22120100011123. The next prime is 22120100011213. The reversal of 22120100011212 is 21211000102122.

It is a super-2 number, since 2×22120100011212² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22120100011191 and 22120100011200.

It is not an unprimeable number, because it can be changed into a prime (22120100011213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19813158 + ... + 20899794.

It is an arithmetic number, because the mean of its divisors is an integer number (623791063728).

Almost surely, 2^{22120100011212} 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 22120100011212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29941971058944).

22120100011212 is an abundant number, since it is smaller than the sum of its proper divisors (37763842106676).

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

22120100011212 is a wasteful number, since it uses less digits than its factorization.

22120100011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090335 (or 1090333 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22120100011212 its reverse (21211000102122), we get a palindrome (43331100113334).

The spelling of 22120100011212 in words is "twenty-two trillion, one hundred twenty billion, one hundred million, eleven thousand, two hundred twelve".