221342116025 has 6 divisors (see below), whose sum is σ = 274464223902. Its totient is φ = 177073692800.

The previous prime is 221342116001. The next prime is 221342116033. The reversal of 221342116025 is 520611243122.

It can be written as a sum of positive squares in 3 ways, for example, as 138391696 + 221203724329 = 11764^2 + 470323^2 .

It is a de Polignac number, because none of the positive numbers 2^k-221342116025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4426842296 + ... + 4426842345.

It is an arithmetic number, because the mean of its divisors is an integer number (45744037317).

Almost surely, 2^221342116025 is an apocalyptic number.

221342116025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221342116025 is a deficient number, since it is larger than the sum of its proper divisors (53122107877).

221342116025 is an equidigital number, since it uses as much as digits as its factorization.

221342116025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8853684651 (or 8853684646 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 221342116025 its reverse (520611243122), we get a palindrome (741953359147).

The spelling of 221342116025 in words is "two hundred twenty-one billion, three hundred forty-two million, one hundred sixteen thousand, twenty-five".