221021000120001 has 16 divisors (see below), whose sum is σ = 294800699824640. Its totient is φ = 147294319536000.

The previous prime is 221021000119981. The next prime is 221021000120087. The reversal of 221021000120001 is 100021000120122.

It is not a de Polignac number, because 221021000120001 - 2¹⁰ = 221021000118977 is a prime.

It is a super-3 number, since 3×221021000120001³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221021000128001) 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, 360651120 + ... + 361263438.

It is an arithmetic number, because the mean of its divisors is an integer number (18425043739040).

Almost surely, 2^{221021000120001} is an apocalyptic number.

It is an amenable number.

221021000120001 is a deficient number, since it is larger than the sum of its proper divisors (73779699704639).

221021000120001 is a wasteful number, since it uses less digits than its factorization.

221021000120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655416.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221021000120001 its reverse (100021000120122), we get a palindrome (321042000240123).

The spelling of 221021000120001 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred twenty thousand, one".