22222201011012 has 18 divisors (see below), whose sum is σ = 56172785889038. Its totient is φ = 7407400336992.

The previous prime is 22222201011011. The next prime is 22222201011047. The reversal of 22222201011012 is 21011010222222.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19108578424896 + 3113622586116 = 4371336^2 + 1764546^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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 (22222201011011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 308641680673 + ... + 308641680744.

Almost surely, 2^{22222201011012} is an apocalyptic number.

It is an amenable number.

22222201011012 is an abundant number, since it is smaller than the sum of its proper divisors (33950584878026).

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

22222201011012 is a wasteful number, since it uses less digits than its factorization.

22222201011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617283361427 (or 617283361422 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22222201011012 its reverse (21011010222222), we get a palindrome (43233211233234).

The spelling of 22222201011012 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred one million, eleven thousand, twelve".