231354344311421 has 4 divisors (see below), whose sum is σ = 231367586521344. Its totient is φ = 231341102101500.

The previous prime is 231354344311369. The next prime is 231354344311459. The reversal of 231354344311421 is 124113443453132.

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 231354344311421 - 2⁴² = 226956297800317 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 (231354344361421) 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, 6621078755 + ... + 6621113696.

It is an arithmetic number, because the mean of its divisors is an integer number (57841896630336).

Almost surely, 2^{231354344311421} is an apocalyptic number.

It is an amenable number.

231354344311421 is a deficient number, since it is larger than the sum of its proper divisors (13242209923).

231354344311421 is a wasteful number, since it uses less digits than its factorization.

231354344311421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13242209922.

The product of its digits is 414720, while the sum is 41.

Adding to 231354344311421 its reverse (124113443453132), we get a palindrome (355467787764553).

The spelling of 231354344311421 in words is "two hundred thirty-one trillion, three hundred fifty-four billion, three hundred forty-four million, three hundred eleven thousand, four hundred twenty-one".