221212102211112 has 32 divisors (see below), whose sum is σ = 553031777448000. Its totient is φ = 73737164481024.

The previous prime is 221212102211099. The next prime is 221212102211123. The reversal of 221212102211112 is 211112201212122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3648612 + ... + 21347987.

It is an arithmetic number, because the mean of its divisors is an integer number (17282243045250).

Almost surely, 2^{221212102211112} is an apocalyptic number.

It is an amenable number.

221212102211112 is an abundant number, since it is smaller than the sum of its proper divisors (331819675236888).

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

221212102211112 is a wasteful number, since it uses less digits than its factorization.

221212102211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25365345 (or 25365341 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 221212102211112 its reverse (211112201212122), we get a palindrome (432324303423234).

The spelling of 221212102211112 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred two million, two hundred eleven thousand, one hundred twelve".