221011111112012 has 96 divisors (see below), whose sum is σ = 424847424133440. Its totient is φ = 99991440506880.

The previous prime is 221011111112009. The next prime is 221011111112083. The reversal of 221011111112012 is 210211111110122.

It is a super-2 number, since 2×221011111112012² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 210000164 + ... + 211049972.

It is an arithmetic number, because the mean of its divisors is an integer number (4425494001390).

Almost surely, 2^{221011111112012} is an apocalyptic number.

It is an amenable number.

221011111112012 is a deficient number, since it is larger than the sum of its proper divisors (203836313021428).

221011111112012 is a wasteful number, since it uses less digits than its factorization.

221011111112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050331 (or 1050329 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 221011111112012 its reverse (210211111110122), we get a palindrome (431222222222134).

The spelling of 221011111112012 in words is "two hundred twenty-one trillion, eleven billion, one hundred eleven million, one hundred twelve thousand, twelve".