340440106021 has 2 divisors, whose sum is σ = 340440106022. Its totient is φ = 340440106020.

The previous prime is 340440105991. The next prime is 340440106057. The reversal of 340440106021 is 120601044043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 322806921921 + 17633184100 = 568161^2 + 132790^2 .

It is a cyclic number.

It is not a de Polignac number, because 340440106021 - 2²⁹ = 339903235109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340440106621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170220053010 + 170220053011.

It is an arithmetic number, because the mean of its divisors is an integer number (170220053011).

Almost surely, 2^340440106021 is an apocalyptic number.

It is an amenable number.

340440106021 is a deficient number, since it is larger than the sum of its proper divisors (1).

340440106021 is an equidigital number, since it uses as much as digits as its factorization.

340440106021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The spelling of 340440106021 in words is "three hundred forty billion, four hundred forty million, one hundred six thousand, twenty-one".