340431323134121 has 4 divisors (see below), whose sum is σ = 348348330648912. Its totient is φ = 332514315619332.

The previous prime is 340431323134117. The next prime is 340431323134127. The reversal of 340431323134121 is 121431323134043.

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 340431323134121 - 2² = 340431323134117 is a prime.

It is a super-3 number, since 3×340431323134121³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (340431323134127) 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, 3958503757331 + ... + 3958503757416.

It is an arithmetic number, because the mean of its divisors is an integer number (87087082662228).

Almost surely, 2^{340431323134121} is an apocalyptic number.

It is an amenable number.

340431323134121 is a deficient number, since it is larger than the sum of its proper divisors (7917007514791).

340431323134121 is an equidigital number, since it uses as much as digits as its factorization.

340431323134121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7917007514790.

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

Adding to 340431323134121 its reverse (121431323134043), we get a palindrome (461862646268164).

The spelling of 340431323134121 in words is "three hundred forty trillion, four hundred thirty-one billion, three hundred twenty-three million, one hundred thirty-four thousand, one hundred twenty-one".