2211200122212 has 18 divisors (see below), whose sum is σ = 5589422531238. Its totient is φ = 737066707392.

The previous prime is 2211200122211. The next prime is 2211200122223. The reversal of 2211200122212 is 2122210021122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1199498086656 + 1011702035556 = 1095216^2 + 1005834^2 .

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

It is a super-3 number, since 3×2211200122212³ (a number of 38 digits) contains 333 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 (2211200122211) 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, 30711112773 + ... + 30711112844.

Almost surely, 2^{2211200122212} is an apocalyptic number.

It is an amenable number.

2211200122212 is an abundant number, since it is smaller than the sum of its proper divisors (3378222409026).

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

2211200122212 is a wasteful number, since it uses less digits than its factorization.

2211200122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61422225627 (or 61422225622 counting only the distinct ones).

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

Adding to 2211200122212 its reverse (2122210021122), we get a palindrome (4333410143334).

The spelling of 2211200122212 in words is "two trillion, two hundred eleven billion, two hundred million, one hundred twenty-two thousand, two hundred twelve".