12143122420 has 48 divisors (see below), whose sum is σ = 29958703488. Its totient is φ = 4076012160.

The previous prime is 12143122393. The next prime is 12143122447. The reversal of 12143122420 is 2422134121.

It is an interprime number because it is at equal distance from previous prime (12143122393) and next prime (12143122447).

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 = 12143122391 and 12143122400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2120064 + ... + 2125783.

It is an arithmetic number, because the mean of its divisors is an integer number (624139656).

Almost surely, 2^12143122420 is an apocalyptic number.

12143122420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12143122420 is an abundant number, since it is smaller than the sum of its proper divisors (17815581068).

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

12143122420 is a wasteful number, since it uses less digits than its factorization.

12143122420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4245880 (or 4245878 counting only the distinct ones).

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

Adding to 12143122420 its reverse (2422134121), we get a palindrome (14565256541).

The spelling of 12143122420 in words is "twelve billion, one hundred forty-three million, one hundred twenty-two thousand, four hundred twenty".