22123030212 has 36 divisors (see below), whose sum is σ = 56130017580. Its totient is φ = 7346926272.

The previous prime is 22123030211. The next prime is 22123030253. The reversal of 22123030212 is 21203032122.

22123030212 is a `hidden beast` number, since 221 + 230 + 3 + 0 + 212 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1229484096 + 20893546116 = 35064^2 + 144546^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×22123030212² (a number of 21 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (22123030211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1132563 + ... + 1151930.

It is an arithmetic number, because the mean of its divisors is an integer number (1559167155).

Almost surely, 2^22123030212 is an apocalyptic number.

It is an amenable number.

22123030212 is an abundant number, since it is smaller than the sum of its proper divisors (34006987368).

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

22123030212 is a wasteful number, since it uses less digits than its factorization.

22123030212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284772 (or 2284767 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 22123030212 its reverse (21203032122), we get a palindrome (43326062334).

The spelling of 22123030212 in words is "twenty-two billion, one hundred twenty-three million, thirty thousand, two hundred twelve".