221001201220028 has 12 divisors (see below), whose sum is σ = 386943848357472. Its totient is φ = 110445815975040.

The previous prime is 221001201220027. The next prime is 221001201220043. The reversal of 221001201220028 is 820022102100122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221001201219985 and 221001201220012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001201220027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13696149668 + ... + 13696165803.

It is an arithmetic number, because the mean of its divisors is an integer number (32245320696456).

Almost surely, 2^{221001201220028} is an apocalyptic number.

It is an amenable number.

221001201220028 is a deficient number, since it is larger than the sum of its proper divisors (165942647137444).

221001201220028 is a wasteful number, since it uses less digits than its factorization.

221001201220028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27392317492 (or 27392317490 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The spelling of 221001201220028 in words is "two hundred twenty-one trillion, one billion, two hundred one million, two hundred twenty thousand, twenty-eight".