12121029 has 8 divisors (see below), whose sum is σ = 17957120. Its totient is φ = 8080668.

The previous prime is 12121009. The next prime is 12121061. The reversal of 12121029 is 92012121.

12121029 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12121029 - 2¹⁵ = 12088261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121009) 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, 224437 + ... + 224490.

It is an arithmetic number, because the mean of its divisors is an integer number (2244640).

Almost surely, 2^12121029 is an apocalyptic number.

It is an amenable number.

12121029 is a deficient number, since it is larger than the sum of its proper divisors (5836091).

12121029 is an equidigital number, since it uses as much as digits as its factorization.

12121029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448936 (or 448930 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 12121029 is about 3481.5268202328. The cubic root of 12121029 is about 229.7099620682.

The spelling of 12121029 in words is "twelve million, one hundred twenty-one thousand, twenty-nine".