340311324231221 has 16 divisors (see below), whose sum is σ = 409406384645760. Its totient is φ = 276336750769920.

The previous prime is 340311324231209. The next prime is 340311324231233. The reversal of 340311324231221 is 122132423113043.

It is an interprime number because it is at equal distance from previous prime (340311324231209) and next prime (340311324231233).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340311324231221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340311324231271) 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, 23191976 + ... + 34906881.

It is an arithmetic number, because the mean of its divisors is an integer number (25587899040360).

Almost surely, 2^{340311324231221} is an apocalyptic number.

It is an amenable number.

340311324231221 is a deficient number, since it is larger than the sum of its proper divisors (69095060414539).

340311324231221 is a wasteful number, since it uses less digits than its factorization.

340311324231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58142924.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 340311324231221 its reverse (122132423113043), we get a palindrome (462443747344264).

The spelling of 340311324231221 in words is "three hundred forty trillion, three hundred eleven billion, three hundred twenty-four million, two hundred thirty-one thousand, two hundred twenty-one".