31213344133421 has 8 divisors (see below), whose sum is σ = 31229265288000. Its totient is φ = 31197423498048.

The previous prime is 31213344133403. The next prime is 31213344133423. The reversal of 31213344133421 is 12433144331213.

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 31213344133421 - 2⁶ = 31213344133357 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 (31213344133423) 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, 191119205 + ... + 191282453.

It is an arithmetic number, because the mean of its divisors is an integer number (3903658161000).

Almost surely, 2^{31213344133421} is an apocalyptic number.

It is an amenable number.

31213344133421 is a deficient number, since it is larger than the sum of its proper divisors (15921154579).

31213344133421 is a wasteful number, since it uses less digits than its factorization.

31213344133421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259603.

The product of its digits is 62208, while the sum is 35.

Adding to 31213344133421 its reverse (12433144331213), we get a palindrome (43646488464634).

The spelling of 31213344133421 in words is "thirty-one trillion, two hundred thirteen billion, three hundred forty-four million, one hundred thirty-three thousand, four hundred twenty-one".