1240343123141 has 4 divisors (see below), whose sum is σ = 1261365888000. Its totient is φ = 1219320358284.

The previous prime is 1240343123101. The next prime is 1240343123237. The reversal of 1240343123141 is 1413213430421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240343123141 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 (1240343123101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10511382341 + ... + 10511382458.

It is an arithmetic number, because the mean of its divisors is an integer number (315341472000).

Almost surely, 2^{1240343123141} is an apocalyptic number.

It is an amenable number.

1240343123141 is a deficient number, since it is larger than the sum of its proper divisors (21022764859).

1240343123141 is an equidigital number, since it uses as much as digits as its factorization.

1240343123141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21022764858.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 1240343123141 its reverse (1413213430421), we get a palindrome (2653556553562).

The spelling of 1240343123141 in words is "one trillion, two hundred forty billion, three hundred forty-three million, one hundred twenty-three thousand, one hundred forty-one".