31223321321 has 8 divisors (see below), whose sum is σ = 31272043104. Its totient is φ = 31174627680.

The previous prime is 31223321273. The next prime is 31223321323. The reversal of 31223321321 is 12312332213.

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 31223321321 - 2²⁶ = 31156212457 is a prime.

It is a super-3 number, since 3×31223321321³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31223321323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3429986 + ... + 3439076.

It is an arithmetic number, because the mean of its divisors is an integer number (3909005388).

Almost surely, 2^31223321321 is an apocalyptic number.

It is an amenable number.

31223321321 is a deficient number, since it is larger than the sum of its proper divisors (48721783).

31223321321 is an equidigital number, since it uses as much as digits as its factorization.

31223321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14071.

The product of its digits is 1296, while the sum is 23.

Adding to 31223321321 its reverse (12312332213), we get a palindrome (43535653534).

The spelling of 31223321321 in words is "thirty-one billion, two hundred twenty-three million, three hundred twenty-one thousand, three hundred twenty-one".