221001101010012 has 48 divisors (see below), whose sum is σ = 515858291020800. Its totient is φ = 73640027619840.

The previous prime is 221001101009989. The next prime is 221001101010013. The reversal of 221001101010012 is 210010101100122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 221001101010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001101010013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1115059939 + ... + 1115258117.

It is an arithmetic number, because the mean of its divisors is an integer number (10747047729600).

Almost surely, 2^{221001101010012} is an apocalyptic number.

It is an amenable number.

221001101010012 is an abundant number, since it is smaller than the sum of its proper divisors (294857190010788).

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

221001101010012 is a wasteful number, since it uses less digits than its factorization.

221001101010012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231786 (or 231784 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221001101010012 its reverse (210010101100122), we get a palindrome (431011202110134).

The spelling of 221001101010012 in words is "two hundred twenty-one trillion, one billion, one hundred one million, ten thousand, twelve".