1240020042323 has 2 divisors, whose sum is σ = 1240020042324. Its totient is φ = 1240020042322.

The previous prime is 1240020042319. The next prime is 1240020042341. The reversal of 1240020042323 is 3232400200421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240020042323 - 2² = 1240020042319 is a prime.

It is a super-2 number, since 2×1240020042323² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1240020042623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620010021161 + 620010021162.

It is an arithmetic number, because the mean of its divisors is an integer number (620010021162).

Almost surely, 2^{1240020042323} is an apocalyptic number.

1240020042323 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240020042323 is an equidigital number, since it uses as much as digits as its factorization.

1240020042323 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 23.

Adding to 1240020042323 its reverse (3232400200421), we get a palindrome (4472420242744).

The spelling of 1240020042323 in words is "one trillion, two hundred forty billion, twenty million, forty-two thousand, three hundred twenty-three".