321166220026225 has 48 divisors (see below), whose sum is σ = 467192190250368. Its totient is φ = 214428106045440.

The previous prime is 321166220026219. The next prime is 321166220026237. The reversal of 321166220026225 is 522620022661123.

It is not a de Polignac number, because 321166220026225 - 2⁹ = 321166220025713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64933024 + ... + 69703873.

It is an arithmetic number, because the mean of its divisors is an integer number (9733170630216).

Almost surely, 2^{321166220026225} is an apocalyptic number.

321166220026225 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

321166220026225 is a deficient number, since it is larger than the sum of its proper divisors (146025970224143).

321166220026225 is a wasteful number, since it uses less digits than its factorization.

321166220026225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134637274 (or 134637269 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

Adding to 321166220026225 its reverse (522620022661123), we get a palindrome (843786242687348).

The spelling of 321166220026225 in words is "three hundred twenty-one trillion, one hundred sixty-six billion, two hundred twenty million, twenty-six thousand, two hundred twenty-five".