221364220057 has 4 divisors (see below), whose sum is σ = 221863914000. Its totient is φ = 220864526116.

The previous prime is 221364219991. The next prime is 221364220069. The reversal of 221364220057 is 750022463122.

221364220057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221364220057 - 2²³ = 221355831449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221364220097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249846307 + ... + 249847192.

It is an arithmetic number, because the mean of its divisors is an integer number (55465978500).

Almost surely, 2^221364220057 is an apocalyptic number.

It is an amenable number.

221364220057 is a deficient number, since it is larger than the sum of its proper divisors (499693943).

221364220057 is an equidigital number, since it uses as much as digits as its factorization.

221364220057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499693942.

The product of its (nonzero) digits is 40320, while the sum is 34.

Adding to 221364220057 its reverse (750022463122), we get a palindrome (971386683179).

The spelling of 221364220057 in words is "two hundred twenty-one billion, three hundred sixty-four million, two hundred twenty thousand, fifty-seven".