12121440000001 has 8 divisors (see below), whose sum is σ = 12856943065824. Its totient is φ = 11388434399040.

The previous prime is 12121439999971. The next prime is 12121440000013. The reversal of 12121440000001 is 10000004412121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12121440000001 - 2⁷ = 12121439999873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12121440000001.

It is not an unprimeable number, because it can be changed into a prime (12121440000031) 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, 624356215 + ... + 624375628.

It is an arithmetic number, because the mean of its divisors is an integer number (1607117883228).

Almost surely, 2^{12121440000001} is an apocalyptic number.

It is an amenable number.

12121440000001 is a deficient number, since it is larger than the sum of its proper divisors (735503065823).

12121440000001 is a wasteful number, since it uses less digits than its factorization.

12121440000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248732431.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12121440000001 its reverse (10000004412121), we get a palindrome (22121444412122).

The spelling of 12121440000001 in words is "twelve trillion, one hundred twenty-one billion, four hundred forty million, one", and thus it is an aban number.