321125013 has 16 divisors (see below), whose sum is σ = 518990400. Its totient is φ = 194621040.

The previous prime is 321125003. The next prime is 321125017. The reversal of 321125013 is 310521123.

It is not a de Polignac number, because 321125013 - 2⁵ = 321124981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321125017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540318 + ... + 540911.

It is an arithmetic number, because the mean of its divisors is an integer number (32436900).

Almost surely, 2^321125013 is an apocalyptic number.

321125013 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

321125013 is a deficient number, since it is larger than the sum of its proper divisors (197865387).

321125013 is a wasteful number, since it uses less digits than its factorization.

321125013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081249 (or 1081243 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 321125013 is about 17919.9613001814. The cubic root of 321125013 is about 684.7910016489.

Adding to 321125013 its reverse (310521123), we get a palindrome (631646136).

It can be divided in two parts, 3211 and 25013, that added together give a square (28224 = 168²).

The spelling of 321125013 in words is "three hundred twenty-one million, one hundred twenty-five thousand, thirteen".