2221200022212 has 72 divisors (see below), whose sum is σ = 5954612836536. Its totient is φ = 695717535744.

The previous prime is 2221200022211. The next prime is 2221200022231. The reversal of 2221200022212 is 2122200021222.

It can be written as a sum of positive squares in 4 ways, for example, as 307199713536 + 1914000308676 = 554256^2 + 1383474^2 .

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 (2221200022211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2563573 + ... + 3318780.

It is an arithmetic number, because the mean of its divisors is an integer number (82702956063).

Almost surely, 2^{2221200022212} is an apocalyptic number.

It is an amenable number.

2221200022212 is an abundant number, since it is smaller than the sum of its proper divisors (3733412814324).

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

2221200022212 is a wasteful number, since it uses less digits than its factorization.

2221200022212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5882997 (or 5882992 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2221200022212 its reverse (2122200021222), we get a palindrome (4343400043434).

The spelling of 2221200022212 in words is "two trillion, two hundred twenty-one billion, two hundred million, twenty-two thousand, two hundred twelve".