221001221021012 has 24 divisors (see below), whose sum is σ = 403568019960000. Its totient is φ = 105696086101056.

The previous prime is 221001221020969. The next prime is 221001221021029. The reversal of 221001221021012 is 210120122100122.

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, 90285239 + ... + 92700737.

It is an arithmetic number, because the mean of its divisors is an integer number (16815334165000).

Almost surely, 2^{221001221021012} is an apocalyptic number.

It is an amenable number.

221001221021012 is a deficient number, since it is larger than the sum of its proper divisors (182566798938988).

221001221021012 is a wasteful number, since it uses less digits than its factorization.

221001221021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410015 (or 3410013 counting only the distinct ones).

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

Adding to 221001221021012 its reverse (210120122100122), we get a palindrome (431121343121134).

The spelling of 221001221021012 in words is "two hundred twenty-one trillion, one billion, two hundred twenty-one million, twenty-one thousand, twelve".