12121011421224 has 64 divisors (see below), whose sum is σ = 30521546496000. Its totient is φ = 4011136681920.

The previous prime is 12121011421163. The next prime is 12121011421243. The reversal of 12121011421224 is 42212411012121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 12121011421194 and 12121011421203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190517179 + ... + 190580789.

It is an arithmetic number, because the mean of its divisors is an integer number (476899164000).

Almost surely, 2^{12121011421224} is an apocalyptic number.

It is an amenable number.

12121011421224 is an abundant number, since it is smaller than the sum of its proper divisors (18400535074776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12121011421224 is a wasteful number, since it uses less digits than its factorization.

12121011421224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120878 (or 120874 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

Adding to 12121011421224 its reverse (42212411012121), we get a palindrome (54333422433345).

The spelling of 12121011421224 in words is "twelve trillion, one hundred twenty-one billion, eleven million, four hundred twenty-one thousand, two hundred twenty-four".