221212110100112 has 20 divisors (see below), whose sum is σ = 451156277178480. Its totient is φ = 104784683731488.

The previous prime is 221212110100013. The next prime is 221212110100139. The reversal of 221212110100112 is 211001011212122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363835707098 + ... + 363835707705.

It is an arithmetic number, because the mean of its divisors is an integer number (22557813858924).

Almost surely, 2^{221212110100112} is an apocalyptic number.

It is an amenable number.

221212110100112 is an abundant number, since it is smaller than the sum of its proper divisors (229944167078368).

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

221212110100112 is a wasteful number, since it uses less digits than its factorization.

221212110100112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727671414830 (or 727671414824 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221212110100112 its reverse (211001011212122), we get a palindrome (432213121312234).

The spelling of 221212110100112 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred ten million, one hundred thousand, one hundred twelve".