340240220214021 has 6 divisors (see below), whose sum is σ = 491458095864710. Its totient is φ = 226826813476008.

The previous prime is 340240220213983. The next prime is 340240220214173. The reversal of 340240220214021 is 120412022042043.

It is a happy number.

340240220214021 is a `hidden beast` number, since 3 + 4 + 0 + 2 + 402 + 20 + 214 + 0 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 297108308448900 + 43131911765121 = 17236830^2 + 6567489^2 .

It is not a de Polignac number, because 340240220214021 - 2⁷ = 340240220213893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340240220214721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18902234456326 + ... + 18902234456343.

Almost surely, 2^{340240220214021} is an apocalyptic number.

It is an amenable number.

340240220214021 is a deficient number, since it is larger than the sum of its proper divisors (151217875650689).

340240220214021 is a wasteful number, since it uses less digits than its factorization.

340240220214021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37804468912675 (or 37804468912672 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 340240220214021 its reverse (120412022042043), we get a palindrome (460652242256064).

The spelling of 340240220214021 in words is "three hundred forty trillion, two hundred forty billion, two hundred twenty million, two hundred fourteen thousand, twenty-one".