31234342343221 has 16 divisors (see below), whose sum is σ = 31566947632000. Its totient is φ = 30903488670528.

The previous prime is 31234342343147. The next prime is 31234342343311. The reversal of 31234342343221 is 12234324343213.

It is a cyclic number.

It is not a de Polignac number, because 31234342343221 - 2¹¹ = 31234342341173 is a prime.

It is a super-2 number, since 2×31234342343221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31234342343021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346237480 + ... + 346327678.

It is an arithmetic number, because the mean of its divisors is an integer number (1972934227000).

Almost surely, 2^{31234342343221} is an apocalyptic number.

It is an amenable number.

31234342343221 is a deficient number, since it is larger than the sum of its proper divisors (332605288779).

31234342343221 is a wasteful number, since it uses less digits than its factorization.

31234342343221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99868.

The product of its digits is 248832, while the sum is 37.

Adding to 31234342343221 its reverse (12234324343213), we get a palindrome (43468666686434).

The spelling of 31234342343221 in words is "thirty-one trillion, two hundred thirty-four billion, three hundred forty-two million, three hundred forty-three thousand, two hundred twenty-one".