12421001145 has 32 divisors (see below), whose sum is σ = 22717043712. Its totient is φ = 5677083072.

The previous prime is 12421001123. The next prime is 12421001207. The reversal of 12421001145 is 54110012421.

It is not a de Polignac number, because 12421001145 - 2⁹ = 12421000633 is a prime.

It is a super-2 number, since 2×12421001145² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 845634 + ... + 860196.

It is an arithmetic number, because the mean of its divisors is an integer number (709907616).

Almost surely, 2^12421001145 is an apocalyptic number.

12421001145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12421001145 is a deficient number, since it is larger than the sum of its proper divisors (10296042567).

12421001145 is a wasteful number, since it uses less digits than its factorization.

12421001145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22701.

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 12421001145 its reverse (54110012421), we get a palindrome (66531013566).

The spelling of 12421001145 in words is "twelve billion, four hundred twenty-one million, one thousand, one hundred forty-five".