31231321330001 has 48 divisors (see below), whose sum is σ = 35784951379200. Its totient is φ = 27189587183616.

The previous prime is 31231321329961. The next prime is 31231321330007. The reversal of 31231321330001 is 10003312313213.

It is not a de Polignac number, because 31231321330001 - 2⁶ = 31231321329937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231321330007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 124067801 + ... + 124319273.

It is an arithmetic number, because the mean of its divisors is an integer number (745519820400).

Almost surely, 2^{31231321330001} is an apocalyptic number.

It is an amenable number.

31231321330001 is a deficient number, since it is larger than the sum of its proper divisors (4553630049199).

31231321330001 is a wasteful number, since it uses less digits than its factorization.

31231321330001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251970 (or 251957 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 31231321330001 its reverse (10003312313213), we get a palindrome (41234633643214).

The spelling of 31231321330001 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twenty-one million, three hundred thirty thousand, one".