340204312011321 has 16 divisors (see below), whose sum is σ = 530533040174400. Its totient is φ = 214865881269984.

The previous prime is 340204312011293. The next prime is 340204312011329. The reversal of 340204312011321 is 123110213402043.

340204312011321 is a `hidden beast` number, since 3 + 4 + 0 + 2 + 0 + 431 + 201 + 1 + 3 + 21 = 666.

It is not a de Polignac number, because 340204312011321 - 2²⁷ = 340204177793593 is a prime.

It is a super-2 number, since 2×340204312011321² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (340204312011329) 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, 331583149596 + ... + 331583150621.

It is an arithmetic number, because the mean of its divisors is an integer number (33158315010900).

Almost surely, 2^{340204312011321} is an apocalyptic number.

It is an amenable number.

340204312011321 is a deficient number, since it is larger than the sum of its proper divisors (190328728163079).

340204312011321 is a wasteful number, since it uses less digits than its factorization.

340204312011321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663166300245 (or 663166300239 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 340204312011321 its reverse (123110213402043), we get a palindrome (463314525413364).

The spelling of 340204312011321 in words is "three hundred forty trillion, two hundred four billion, three hundred twelve million, eleven thousand, three hundred twenty-one".