12421434502 has 16 divisors (see below), whose sum is σ = 19215152352. Its totient is φ = 6017777280.

The previous prime is 12421434491. The next prime is 12421434503. The reversal of 12421434502 is 20543412421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421434503) 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, 330418 + ... + 366085.

It is an arithmetic number, because the mean of its divisors is an integer number (1200947022).

Almost surely, 2^12421434502 is an apocalyptic number.

12421434502 is a deficient number, since it is larger than the sum of its proper divisors (6793717850).

12421434502 is a wasteful number, since it uses less digits than its factorization.

12421434502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696783.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 12421434502 its reverse (20543412421), we get a palindrome (32964846923).

The spelling of 12421434502 in words is "twelve billion, four hundred twenty-one million, four hundred thirty-four thousand, five hundred two".