221021100212012 has 12 divisors (see below), whose sum is σ = 386790867915816. Its totient is φ = 110509423664640.

The previous prime is 221021100212009. The next prime is 221021100212047. The reversal of 221021100212012 is 210212001120122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281168789 + ... + 281953772.

It is an arithmetic number, because the mean of its divisors is an integer number (32232572326318).

Almost surely, 2^{221021100212012} is an apocalyptic number.

It is an amenable number.

221021100212012 is a deficient number, since it is larger than the sum of its proper divisors (165769767703804).

221021100212012 is a wasteful number, since it uses less digits than its factorization.

221021100212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563220688 (or 563220686 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221021100212012 its reverse (210212001120122), we get a palindrome (431233101332134).

The spelling of 221021100212012 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred million, two hundred twelve thousand, twelve".