12245400021 has 8 divisors (see below), whose sum is σ = 16331928640. Its totient is φ = 8161235712.

The previous prime is 12245400001. The next prime is 12245400023. The reversal of 12245400021 is 12000454221.

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

It is a de Polignac number, because none of the positive numbers 2^k-12245400021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12245400023) 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, 578956 + ... + 599733.

It is an arithmetic number, because the mean of its divisors is an integer number (2041491080).

Almost surely, 2^12245400021 is an apocalyptic number.

It is an amenable number.

12245400021 is a deficient number, since it is larger than the sum of its proper divisors (4086528619).

12245400021 is a wasteful number, since it uses less digits than its factorization.

12245400021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182155.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 12245400021 its reverse (12000454221), we get a palindrome (24245854242).

The spelling of 12245400021 in words is "twelve billion, two hundred forty-five million, four hundred thousand, twenty-one".