221001021120021 has 8 divisors (see below), whose sum is σ = 294977228613120. Its totient is φ = 147179413853472.

The previous prime is 221001021120001. The next prime is 221001021120023. The reversal of 221001021120021 is 120021120100122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221001021120021 - 2²⁷ = 221000886902293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001021120023) 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 7 ways as a sum of consecutive naturals, for example, 38650053301 + ... + 38650059018.

It is an arithmetic number, because the mean of its divisors is an integer number (36872153576640).

Almost surely, 2^{221001021120021} is an apocalyptic number.

It is an amenable number.

221001021120021 is a deficient number, since it is larger than the sum of its proper divisors (73976207493099).

221001021120021 is an equidigital number, since it uses as much as digits as its factorization.

221001021120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77300113275.

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

Adding to 221001021120021 its reverse (120021120100122), we get a palindrome (341022141220143).

The spelling of 221001021120021 in words is "two hundred twenty-one trillion, one billion, twenty-one million, one hundred twenty thousand, twenty-one".