225016326121 has 4 divisors (see below), whose sum is σ = 234799644672. Its totient is φ = 215233007572.

The previous prime is 225016326113. The next prime is 225016326181. The reversal of 225016326121 is 121623610522.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121623610522 = 2 ⋅60811805261.

It is a cyclic number.

It is not a de Polignac number, because 225016326121 - 2³ = 225016326113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225016326181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4891659241 + ... + 4891659286.

It is an arithmetic number, because the mean of its divisors is an integer number (58699911168).

Almost surely, 2^225016326121 is an apocalyptic number.

It is an amenable number.

225016326121 is a deficient number, since it is larger than the sum of its proper divisors (9783318551).

225016326121 is an equidigital number, since it uses as much as digits as its factorization.

225016326121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9783318550.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 225016326121 its reverse (121623610522), we get a palindrome (346639936643).

The spelling of 225016326121 in words is "two hundred twenty-five billion, sixteen million, three hundred twenty-six thousand, one hundred twenty-one".