12121243029 has 32 divisors (see below), whose sum is σ = 20533002240. Its totient is φ = 6922961136.

The previous prime is 12121242997. The next prime is 12121243051. The reversal of 12121243029 is 92034212121.

12121243029 is a `hidden beast` number, since 1 + 212 + 12 + 430 + 2 + 9 = 666.

It is not a de Polignac number, because 12121243029 - 2⁵ = 12121242997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 12121242993 and 12121243011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121241029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 390064 + ... + 419990.

It is an arithmetic number, because the mean of its divisors is an integer number (641656320).

Almost surely, 2^12121243029 is an apocalyptic number.

It is an amenable number.

12121243029 is a deficient number, since it is larger than the sum of its proper divisors (8411759211).

12121243029 is a wasteful number, since it uses less digits than its factorization.

12121243029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32086 (or 32080 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The spelling of 12121243029 in words is "twelve billion, one hundred twenty-one million, two hundred forty-three thousand, twenty-nine".