340241221 has 2 divisors, whose sum is σ = 340241222. Its totient is φ = 340241220.

The previous prime is 340241201. The next prime is 340241249. The reversal of 340241221 is 122142043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310112100 + 30129121 = 17610^2 + 5489^2 .

It is a cyclic number.

It is not a de Polignac number, because 340241221 - 2⁹ = 340240709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340241201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170120610 + 170120611.

It is an arithmetic number, because the mean of its divisors is an integer number (170120611).

Almost surely, 2^340241221 is an apocalyptic number.

It is an amenable number.

340241221 is a deficient number, since it is larger than the sum of its proper divisors (1).

340241221 is an equidigital number, since it uses as much as digits as its factorization.

340241221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 340241221 is about 18445.6287775722. The cubic root of 340241221 is about 698.1182254456.

Adding to 340241221 its reverse (122142043), we get a palindrome (462383264).

It can be divided in two parts, 34024 and 1221, that added together give a triangular number (35245 = T₂₆₅).

The spelling of 340241221 in words is "three hundred forty million, two hundred forty-one thousand, two hundred twenty-one".