231321133301021 has 4 divisors (see below), whose sum is σ = 231323009401632. Its totient is φ = 231319257200412.

The previous prime is 231321133300973. The next prime is 231321133301081. The reversal of 231321133301021 is 120103331123132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231321133301021 - 2²⁶ = 231321066192157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231321133301081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 937865345 + ... + 938111958.

It is an arithmetic number, because the mean of its divisors is an integer number (57830752350408).

Almost surely, 2^{231321133301021} is an apocalyptic number.

It is an amenable number.

231321133301021 is a deficient number, since it is larger than the sum of its proper divisors (1876100611).

231321133301021 is a wasteful number, since it uses less digits than its factorization.

231321133301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876100610.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 231321133301021 its reverse (120103331123132), we get a palindrome (351424464424153).

The spelling of 231321133301021 in words is "two hundred thirty-one trillion, three hundred twenty-one billion, one hundred thirty-three million, three hundred one thousand, twenty-one".