225122177021 has 8 divisors (see below), whose sum is σ = 261643208640. Its totient is φ = 189691325568.

The previous prime is 225122177011. The next prime is 225122177023. The reversal of 225122177021 is 120771221522.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225122177021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225122177023) 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, 272544596 + ... + 272545421.

It is an arithmetic number, because the mean of its divisors is an integer number (32705401080).

Almost surely, 2^225122177021 is an apocalyptic number.

It is an amenable number.

225122177021 is a deficient number, since it is larger than the sum of its proper divisors (36521031619).

225122177021 is an equidigital number, since it uses as much as digits as its factorization.

225122177021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545090083.

The product of its (nonzero) digits is 7840, while the sum is 32.

Adding to 225122177021 its reverse (120771221522), we get a palindrome (345893398543).

The spelling of 225122177021 in words is "two hundred twenty-five billion, one hundred twenty-two million, one hundred seventy-seven thousand, twenty-one".