12021402124 has 12 divisors (see below), whose sum is σ = 21434387184. Its totient is φ = 5897291504.

The previous prime is 12021402121. The next prime is 12021402149. The reversal of 12021402124 is 42120412021.

It is a super-2 number, since 2×12021402124² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12021402121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28352152 + ... + 28352575.

It is an arithmetic number, because the mean of its divisors is an integer number (1786198932).

Almost surely, 2^12021402124 is an apocalyptic number.

It is an amenable number.

12021402124 is a deficient number, since it is larger than the sum of its proper divisors (9412985060).

12021402124 is a wasteful number, since it uses less digits than its factorization.

12021402124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56704784 (or 56704782 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12021402124 its reverse (42120412021), we get a palindrome (54141814145).

The spelling of 12021402124 in words is "twelve billion, twenty-one million, four hundred two thousand, one hundred twenty-four".