321321318451 has 16 divisors (see below), whose sum is σ = 379450777600. Its totient is φ = 266266297440.

The previous prime is 321321318431. The next prime is 321321318463. The reversal of 321321318451 is 154813123123.

It is a cyclic number.

It is not a de Polignac number, because 321321318451 - 2¹³ = 321321310259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321321318431) 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, 526251 + ... + 958948.

It is an arithmetic number, because the mean of its divisors is an integer number (23715673600).

Almost surely, 2^321321318451 is an apocalyptic number.

321321318451 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

321321318451 is a deficient number, since it is larger than the sum of its proper divisors (58129459149).

321321318451 is a wasteful number, since it uses less digits than its factorization.

321321318451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486234.

The product of its digits is 17280, while the sum is 34.

The spelling of 321321318451 in words is "three hundred twenty-one billion, three hundred twenty-one million, three hundred eighteen thousand, four hundred fifty-one".