12489948221 has 8 divisors (see below), whose sum is σ = 13034313600. Its totient is φ = 11945693232.

The previous prime is 12489948193. The next prime is 12489948283. The reversal of 12489948221 is 12284998421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12489948221 is a prime.

It is a super-2 number, since 2×12489948221² (a number of 21 digits) contains 22 as substring.

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 12489948221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12489942221) 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, 273755 + ... + 316103.

It is an arithmetic number, because the mean of its divisors is an integer number (1629289200).

Almost surely, 2^12489948221 is an apocalyptic number.

It is an amenable number.

12489948221 is a deficient number, since it is larger than the sum of its proper divisors (544365379).

12489948221 is a wasteful number, since it uses less digits than its factorization.

12489948221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55195.

The product of its digits is 663552, while the sum is 50.

The spelling of 12489948221 in words is "twelve billion, four hundred eighty-nine million, nine hundred forty-eight thousand, two hundred twenty-one".