129213430043 has 4 divisors (see below), whose sum is σ = 129220465968. Its totient is φ = 129206394120.

The previous prime is 129213430033. The next prime is 129213430103. The reversal of 129213430043 is 340034312921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129213430043 - 2³⁰ = 128139688219 is a prime.

It is a super-2 number, since 2×129213430043² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129213429991 and 129213430009.

It is not an unprimeable number, because it can be changed into a prime (129213430013) 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, 3490343 + ... + 3527168.

It is an arithmetic number, because the mean of its divisors is an integer number (32305116492).

Almost surely, 2^129213430043 is an apocalyptic number.

129213430043 is a deficient number, since it is larger than the sum of its proper divisors (7035925).

129213430043 is an equidigital number, since it uses as much as digits as its factorization.

129213430043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7035924.

The product of its (nonzero) digits is 15552, while the sum is 32.

Adding to 129213430043 its reverse (340034312921), we get a palindrome (469247742964).

The spelling of 129213430043 in words is "one hundred twenty-nine billion, two hundred thirteen million, four hundred thirty thousand, forty-three".