222100221220212 has 48 divisors (see below), whose sum is σ = 518573486293632. Its totient is φ = 73984890794880.

The previous prime is 222100221220211. The next prime is 222100221220217. The reversal of 222100221220212 is 212022122001222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222100221220211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 591273537 + ... + 591649047.

It is an arithmetic number, because the mean of its divisors is an integer number (10803614297784).

Almost surely, 2^{222100221220212} is an apocalyptic number.

It is an amenable number.

222100221220212 is an abundant number, since it is smaller than the sum of its proper divisors (296473265073420).

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

222100221220212 is a wasteful number, since it uses less digits than its factorization.

222100221220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407688 (or 407686 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 222100221220212 its reverse (212022122001222), we get a palindrome (434122343221434).

The spelling of 222100221220212 in words is "two hundred twenty-two trillion, one hundred billion, two hundred twenty-one million, two hundred twenty thousand, two hundred twelve".