221310300400021 has 8 divisors (see below), whose sum is σ = 252926326275840. Its totient is φ = 189694341693168.

The previous prime is 221310300399959. The next prime is 221310300400073. The reversal of 221310300400021 is 120004003013122.

It is a happy number.

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 221310300400021 - 2²¹ = 221310298302869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221310300404021) 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, 9522046 + ... + 23093071.

It is an arithmetic number, because the mean of its divisors is an integer number (31615790784480).

Almost surely, 2^{221310300400021} is an apocalyptic number.

It is an amenable number.

221310300400021 is a deficient number, since it is larger than the sum of its proper divisors (31616025875819).

221310300400021 is an equidigital number, since it uses as much as digits as its factorization.

221310300400021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33584483.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 221310300400021 its reverse (120004003013122), we get a palindrome (341314303413143).

The spelling of 221310300400021 in words is "two hundred twenty-one trillion, three hundred ten billion, three hundred million, four hundred thousand, twenty-one".