12421122512 has 20 divisors (see below), whose sum is σ = 24159574596. Its totient is φ = 6186393600.

The previous prime is 12421122479. The next prime is 12421122547. The reversal of 12421122512 is 21522112421.

It can be written as a sum of positive squares in 2 ways, for example, as 11264850496 + 1156272016 = 106136^2 + 34004^2 .

It is a super-2 number, since 2×12421122512² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1506239 + ... + 1514462.

Almost surely, 2^12421122512 is an apocalyptic number.

It is an amenable number.

12421122512 is a deficient number, since it is larger than the sum of its proper divisors (11738452084).

12421122512 is a wasteful number, since it uses less digits than its factorization.

12421122512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020966 (or 3020960 counting only the distinct ones).

The product of its digits is 640, while the sum is 23.

Adding to 12421122512 its reverse (21522112421), we get a palindrome (33943234933).

The spelling of 12421122512 in words is "twelve billion, four hundred twenty-one million, one hundred twenty-two thousand, five hundred twelve".