221212212022112 has 12 divisors (see below), whose sum is σ = 435511542418596. Its totient is φ = 110606106011040.

The previous prime is 221212212022079. The next prime is 221212212022117. The reversal of 221212212022112 is 211220212212122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212212022117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3456440812814 + ... + 3456440812877.

It is an arithmetic number, because the mean of its divisors is an integer number (36292628534883).

Almost surely, 2^{221212212022112} is an apocalyptic number.

It is an amenable number.

221212212022112 is a deficient number, since it is larger than the sum of its proper divisors (214299330396484).

221212212022112 is an equidigital number, since it uses as much as digits as its factorization.

221212212022112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6912881625701 (or 6912881625693 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 221212212022112 its reverse (211220212212122), we get a palindrome (432432424234234).

The spelling of 221212212022112 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred twelve million, twenty-two thousand, one hundred twelve".