12982249921 has 4 divisors (see below), whose sum is σ = 13031612352. Its totient is φ = 12932887492.

The previous prime is 12982249919. The next prime is 12982250011. The reversal of 12982249921 is 12994228921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12994228921 = 907 ⋅14326603.

It is a cyclic number.

It is not a de Polignac number, because 12982249921 - 2¹ = 12982249919 is a prime.

It is a super-2 number, since 2×12982249921² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12982249321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24680821 + ... + 24681346.

It is an arithmetic number, because the mean of its divisors is an integer number (3257903088).

Almost surely, 2^12982249921 is an apocalyptic number.

It is an amenable number.

12982249921 is a deficient number, since it is larger than the sum of its proper divisors (49362431).

12982249921 is an equidigital number, since it uses as much as digits as its factorization.

12982249921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49362430.

The product of its digits is 373248, while the sum is 49.

The spelling of 12982249921 in words is "twelve billion, nine hundred eighty-two million, two hundred forty-nine thousand, nine hundred twenty-one".