320211421225 has 12 divisors (see below), whose sum is σ = 402501372316. Its totient is φ = 252659969280.

The previous prime is 320211421213. The next prime is 320211421241. The reversal of 320211421225 is 522124112023.

It can be written as a sum of positive squares in 6 ways, for example, as 16592788969 + 303618632256 = 128813^2 + 551016^2 .

It is not a de Polignac number, because 320211421225 - 2¹³ = 320211413033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320211421225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87727332 + ... + 87730981.

Almost surely, 2^320211421225 is an apocalyptic number.

It is an amenable number.

320211421225 is a deficient number, since it is larger than the sum of its proper divisors (82289951091).

320211421225 is a wasteful number, since it uses less digits than its factorization.

320211421225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175458396 (or 175458391 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 320211421225 its reverse (522124112023), we get a palindrome (842335533248).

The spelling of 320211421225 in words is "three hundred twenty billion, two hundred eleven million, four hundred twenty-one thousand, two hundred twenty-five".