129213430042 has 16 divisors (see below), whose sum is σ = 199851617952. Its totient is φ = 62610138000.

The previous prime is 129213430033. The next prime is 129213430103. The reversal of 129213430042 is 240034312921.

It is a super-2 number, since 2×129213430042² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129213429986 and 129213430013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3459768 + ... + 3496915.

It is an arithmetic number, because the mean of its divisors is an integer number (12490726122).

Almost surely, 2^129213430042 is an apocalyptic number.

129213430042 is a deficient number, since it is larger than the sum of its proper divisors (70638187910).

129213430042 is a wasteful number, since it uses less digits than its factorization.

129213430042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6956973.

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 129213430042 its reverse (240034312921), we get a palindrome (369247742963).

The spelling of 129213430042 in words is "one hundred twenty-nine billion, two hundred thirteen million, four hundred thirty thousand, forty-two".