340145150021 has 2 divisors, whose sum is σ = 340145150022. Its totient is φ = 340145150020.

The previous prime is 340145150017. The next prime is 340145150071. The reversal of 340145150021 is 120051541043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319920328225 + 20224821796 = 565615^2 + 142214^2 .

It is a cyclic number.

It is not a de Polignac number, because 340145150021 - 2² = 340145150017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340145150071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170072575010 + 170072575011.

It is an arithmetic number, because the mean of its divisors is an integer number (170072575011).

Almost surely, 2^340145150021 is an apocalyptic number.

It is an amenable number.

340145150021 is a deficient number, since it is larger than the sum of its proper divisors (1).

340145150021 is an equidigital number, since it uses as much as digits as its factorization.

340145150021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 340145150021 its reverse (120051541043), we get a palindrome (460196691064).

The spelling of 340145150021 in words is "three hundred forty billion, one hundred forty-five million, one hundred fifty thousand, twenty-one".