231312221003 has 8 divisors (see below), whose sum is σ = 238613247120. Its totient is φ = 224124389280.

The previous prime is 231312220973. The next prime is 231312221053. The reversal of 231312221003 is 300122213132.

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 231312221003 - 2³² = 227017253707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231312221053) 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, 28294448 + ... + 28302621.

It is an arithmetic number, because the mean of its divisors is an integer number (29826655890).

Almost surely, 2^231312221003 is an apocalyptic number.

231312221003 is a deficient number, since it is larger than the sum of its proper divisors (7301026117).

231312221003 is an equidigital number, since it uses as much as digits as its factorization.

231312221003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56597197.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 231312221003 its reverse (300122213132), we get a palindrome (531434434135).

The spelling of 231312221003 in words is "two hundred thirty-one billion, three hundred twelve million, two hundred twenty-one thousand, three".