1240203342043 has 16 divisors (see below), whose sum is σ = 1254682376640. Its totient is φ = 1225808073216.

The previous prime is 1240203342031. The next prime is 1240203342083. The reversal of 1240203342043 is 3402433020421.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240203342043 is a prime.

It is a super-2 number, since 2×1240203342043² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240203342013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75260521 + ... + 75276997.

It is an arithmetic number, because the mean of its divisors is an integer number (78417648540).

Almost surely, 2^{1240203342043} is an apocalyptic number.

1240203342043 is a deficient number, since it is larger than the sum of its proper divisors (14479034597).

1240203342043 is a wasteful number, since it uses less digits than its factorization.

1240203342043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18966.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 1240203342043 its reverse (3402433020421), we get a palindrome (4642636362464).

The spelling of 1240203342043 in words is "one trillion, two hundred forty billion, two hundred three million, three hundred forty-two thousand, forty-three".