12131034421 has 16 divisors (see below), whose sum is σ = 13709477376. Its totient is φ = 10634400000.

The previous prime is 12131034413. The next prime is 12131034451. The reversal of 12131034421 is 12443013121.

It is a cyclic number.

It is not a de Polignac number, because 12131034421 - 2³ = 12131034413 is a prime.

It is a super-2 number, since 2×12131034421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12131034392 and 12131034401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131034451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32521 + ... + 159121.

It is an arithmetic number, because the mean of its divisors is an integer number (856842336).

Almost surely, 2^12131034421 is an apocalyptic number.

12131034421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12131034421 is a deficient number, since it is larger than the sum of its proper divisors (1578442955).

12131034421 is a wasteful number, since it uses less digits than its factorization.

12131034421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126924.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 12131034421 its reverse (12443013121), we get a palindrome (24574047542).

The spelling of 12131034421 in words is "twelve billion, one hundred thirty-one million, thirty-four thousand, four hundred twenty-one".