321113015155 has 8 divisors (see below), whose sum is σ = 392606101872. Its totient is φ = 252043423008.

The previous prime is 321113015071. The next prime is 321113015173. The reversal of 321113015155 is 551510311123.

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

It is a cyclic number.

It is not a de Polignac number, because 321113015155 - 2²³ = 321104626547 is a prime.

It is a super-3 number, since 3×321113015155³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 605873349 + ... + 605873878.

It is an arithmetic number, because the mean of its divisors is an integer number (49075762734).

Almost surely, 2^321113015155 is an apocalyptic number.

321113015155 is a deficient number, since it is larger than the sum of its proper divisors (71493086717).

321113015155 is a wasteful number, since it uses less digits than its factorization.

321113015155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211747285.

The product of its (nonzero) digits is 2250, while the sum is 28.

Adding to 321113015155 its reverse (551510311123), we get a palindrome (872623326278).

The spelling of 321113015155 in words is "three hundred twenty-one billion, one hundred thirteen million, fifteen thousand, one hundred fifty-five".