12134212420 has 24 divisors (see below), whose sum is σ = 27798378048. Its totient is φ = 4412440800.

The previous prime is 12134212411. The next prime is 12134212427. The reversal of 12134212420 is 2421243121.

It is a super-2 number, since 2×12134212420² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 12134212391 and 12134212400.

It is not an unprimeable number, because it can be changed into a prime (12134212427) 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, 27577536 + ... + 27577975.

It is an arithmetic number, because the mean of its divisors is an integer number (1158265752).

Almost surely, 2^12134212420 is an apocalyptic number.

12134212420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12134212420 is an abundant number, since it is smaller than the sum of its proper divisors (15664165628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12134212420 is a wasteful number, since it uses less digits than its factorization.

12134212420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55155531 (or 55155529 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 12134212420 its reverse (2421243121), we get a palindrome (14555455541).

The spelling of 12134212420 in words is "twelve billion, one hundred thirty-four million, two hundred twelve thousand, four hundred twenty".