12021424129 has 16 divisors (see below), whose sum is σ = 14451522624. Its totient is φ = 9853300800.

The previous prime is 12021424123. The next prime is 12021424133. The reversal of 12021424129 is 92142412021.

It is a cyclic number.

It is not a de Polignac number, because 12021424129 - 2⁵ = 12021424097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12021424097 and 12021424106.

It is not an unprimeable number, because it can be changed into a prime (12021424123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 971362 + ... + 983659.

It is an arithmetic number, because the mean of its divisors is an integer number (903220164).

Almost surely, 2^12021424129 is an apocalyptic number.

It is an amenable number.

12021424129 is a deficient number, since it is larger than the sum of its proper divisors (2430098495).

12021424129 is a wasteful number, since it uses less digits than its factorization.

12021424129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955088.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 12021424129 in words is "twelve billion, twenty-one million, four hundred twenty-four thousand, one hundred twenty-nine".