221112011001212 has 24 divisors (see below), whose sum is σ = 387377362890000. Its totient is φ = 110432820026880.

The previous prime is 221112011001179. The next prime is 221112011001221. The reversal of 221112011001212 is 212100110211122.

It is a congruent number.

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, 8978762 + ... + 22865742.

It is an arithmetic number, because the mean of its divisors is an integer number (16140723453750).

Almost surely, 2^{221112011001212} is an apocalyptic number.

It is an amenable number.

221112011001212 is a deficient number, since it is larger than the sum of its proper divisors (166265351888788).

221112011001212 is a wasteful number, since it uses less digits than its factorization.

221112011001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13891421 (or 13891419 counting only the distinct ones).

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

Adding to 221112011001212 its reverse (212100110211122), we get a palindrome (433212121212334).

The spelling of 221112011001212 in words is "two hundred twenty-one trillion, one hundred twelve billion, eleven million, one thousand, two hundred twelve".