221100011212112 has 80 divisors (see below), whose sum is σ = 447388091579520. Its totient is φ = 105653251123200.

The previous prime is 221100011212099. The next prime is 221100011212183. The reversal of 221100011212112 is 211212110001122.

It is a super-2 number, since 2×221100011212112² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3341410964 + ... + 3341477132.

It is an arithmetic number, because the mean of its divisors is an integer number (5592351144744).

Almost surely, 2^{221100011212112} is an apocalyptic number.

It is an amenable number.

221100011212112 is an abundant number, since it is smaller than the sum of its proper divisors (226288080367408).

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

221100011212112 is a wasteful number, since it uses less digits than its factorization.

221100011212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73812 (or 73806 counting only the distinct ones).

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

Adding to 221100011212112 its reverse (211212110001122), we get a palindrome (432312121213234).

The spelling of 221100011212112 in words is "two hundred twenty-one trillion, one hundred billion, eleven million, two hundred twelve thousand, one hundred twelve".