1243430145121 has 8 divisors (see below), whose sum is σ = 1320240435840. Its totient is φ = 1167027336768.

The previous prime is 1243430145119. The next prime is 1243430145157. The reversal of 1243430145121 is 1215410343421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1243430145121 - 2¹ = 1243430145119 is a prime.

It is a super-2 number, since 2×1243430145121² (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 (1243430142121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101864301 + ... + 101876506.

It is an arithmetic number, because the mean of its divisors is an integer number (165030054480).

Almost surely, 2^{1243430145121} is an apocalyptic number.

It is an amenable number.

1243430145121 is a deficient number, since it is larger than the sum of its proper divisors (76810290719).

1243430145121 is a wasteful number, since it uses less digits than its factorization.

1243430145121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203741183.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 1243430145121 its reverse (1215410343421), we get a palindrome (2458840488542).

The spelling of 1243430145121 in words is "one trillion, two hundred forty-three billion, four hundred thirty million, one hundred forty-five thousand, one hundred twenty-one".