221131301120021 has 8 divisors (see below), whose sum is σ = 226525839793344. Its totient is φ = 215736814461280.

The previous prime is 221131301120017. The next prime is 221131301120039. The reversal of 221131301120021 is 120021103131122.

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

It is a cyclic number.

It is not a de Polignac number, because 221131301120021 - 2² = 221131301120017 is a prime.

It is a super-3 number, since 3×221131301120021³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221131301119975 and 221131301120002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221131301120921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4327511 + ... + 21470676.

It is an arithmetic number, because the mean of its divisors is an integer number (28315729974168).

Almost surely, 2^{221131301120021} is an apocalyptic number.

It is an amenable number.

221131301120021 is a deficient number, since it is larger than the sum of its proper divisors (5394538673323).

221131301120021 is a wasteful number, since it uses less digits than its factorization.

221131301120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26007291.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 221131301120021 its reverse (120021103131122), we get a palindrome (341152404251143).

The spelling of 221131301120021 in words is "two hundred twenty-one trillion, one hundred thirty-one billion, three hundred one million, one hundred twenty thousand, twenty-one".