221021110220001 has 48 divisors (see below), whose sum is σ = 388608545505600. Its totient is φ = 110446639212672.

The previous prime is 221021110219969. The next prime is 221021110220023. The reversal of 221021110220001 is 100022011120122.

It is not a de Polignac number, because 221021110220001 - 2⁵ = 221021110219969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221021110210001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3043576986 + ... + 3043649603.

It is an arithmetic number, because the mean of its divisors is an integer number (8096011364700).

Almost surely, 2^{221021110220001} is an apocalyptic number.

221021110220001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221021110220001 is a deficient number, since it is larger than the sum of its proper divisors (167587435285599).

221021110220001 is a wasteful number, since it uses less digits than its factorization.

221021110220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6087226638 (or 6087226631 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221021110220001 its reverse (100022011120122), we get a palindrome (321043121340123).

The spelling of 221021110220001 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred ten million, two hundred twenty thousand, one".