231321020307 has 32 divisors (see below), whose sum is σ = 342996326400. Its totient is φ = 137707810560.

The previous prime is 231321020267. The next prime is 231321020383. The reversal of 231321020307 is 703020123132.

It is not a de Polignac number, because 231321020307 - 2¹⁴ = 231321003923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231321022307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3322944 + ... + 3391842.

It is an arithmetic number, because the mean of its divisors is an integer number (10718635200).

Almost surely, 2^231321020307 is an apocalyptic number.

231321020307 is a deficient number, since it is larger than the sum of its proper divisors (111675306093).

231321020307 is a wasteful number, since it uses less digits than its factorization.

231321020307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71723.

The product of its (nonzero) digits is 1512, while the sum is 24.

Adding to 231321020307 its reverse (703020123132), we get a palindrome (934341143439).

The spelling of 231321020307 in words is "two hundred thirty-one billion, three hundred twenty-one million, twenty thousand, three hundred seven".