2221222222212 has 192 divisors, whose sum is σ = 6259405824000. Its totient is φ = 598884503040.

The previous prime is 2221222222187. The next prime is 2221222222213. The reversal of 2221222222212 is 2122222221222.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (2221222222213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 831605637 + ... + 831608307.

It is an arithmetic number, because the mean of its divisors is an integer number (32601072000).

Almost surely, 2^{2221222222212} 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 2221222222212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3129702912000).

2221222222212 is an abundant number, since it is smaller than the sum of its proper divisors (4038183601788).

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

2221222222212 is a wasteful number, since it uses less digits than its factorization.

2221222222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4546 (or 4544 counting only the distinct ones).

The product of its digits is 2048, while the sum is 24.

Adding to 2221222222212 its reverse (2122222221222), we get a palindrome (4343444443434).

It can be divided in two parts, 22 and 21222222212, that multiplied together give a palindrome (466888888664).

The spelling of 2221222222212 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twelve".