340553212321 has 16 divisors (see below), whose sum is σ = 400927824000. Its totient is φ = 283200761088.

The previous prime is 340553212309. The next prime is 340553212331. The reversal of 340553212321 is 123212355043.

It is not a de Polignac number, because 340553212321 - 2⁷ = 340553212193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340553212331) 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, 3751816 + ... + 3841513.

It is an arithmetic number, because the mean of its divisors is an integer number (25057989000).

Almost surely, 2^340553212321 is an apocalyptic number.

It is an amenable number.

340553212321 is a deficient number, since it is larger than the sum of its proper divisors (60374611679).

340553212321 is a wasteful number, since it uses less digits than its factorization.

340553212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7593528.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 340553212321 its reverse (123212355043), we get a palindrome (463765567364).

The spelling of 340553212321 in words is "three hundred forty billion, five hundred fifty-three million, two hundred twelve thousand, three hundred twenty-one".