220221100121001 has 16 divisors (see below), whose sum is σ = 336979089254400. Its totient is φ = 125314098810768.

The previous prime is 220221100120999. The next prime is 220221100121047. The reversal of 220221100121001 is 100121001122022.

It is not a de Polignac number, because 220221100121001 - 2¹ = 220221100120999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220221100120001) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 21938737771 + ... + 21938747808.

It is an arithmetic number, because the mean of its divisors is an integer number (21061193078400).

Almost surely, 2^{220221100121001} is an apocalyptic number.

220221100121001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220221100121001 is a deficient number, since it is larger than the sum of its proper divisors (116757989133399).

220221100121001 is a wasteful number, since it uses less digits than its factorization.

220221100121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43877485828.

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

Adding to 220221100121001 its reverse (100121001122022), we get a palindrome (320342101243023).

The spelling of 220221100121001 in words is "two hundred twenty trillion, two hundred twenty-one billion, one hundred million, one hundred twenty-one thousand, one".