1243034321023 has 16 divisors (see below), whose sum is σ = 1370833390080. Its totient is φ = 1117761249600.

The previous prime is 1243034320999. The next prime is 1243034321047. The reversal of 1243034321023 is 3201234303421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1243034320999) and next prime (1243034321047).

It is a cyclic number.

It is not a de Polignac number, because 1243034321023 - 2¹⁷ = 1243034189951 is a prime.

It is a super-2 number, since 2×1243034321023² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1243034320982 and 1243034321000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243034321083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1085590 + ... + 1914307.

It is an arithmetic number, because the mean of its divisors is an integer number (85677086880).

Almost surely, 2^{1243034321023} is an apocalyptic number.

1243034321023 is a deficient number, since it is larger than the sum of its proper divisors (127799069057).

1243034321023 is a wasteful number, since it uses less digits than its factorization.

1243034321023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000318.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 1243034321023 its reverse (3201234303421), we get a palindrome (4444268624444).

The spelling of 1243034321023 in words is "one trillion, two hundred forty-three billion, thirty-four million, three hundred twenty-one thousand, twenty-three".