1243421143412 has 48 divisors (see below), whose sum is σ = 2599710597120. Its totient is φ = 508793437152.

The previous prime is 1243421143381. The next prime is 1243421143439. The reversal of 1243421143412 is 2143411243421.

It is a super-2 number, since 2×1243421143412² (a number of 25 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 15 ways as a sum of consecutive naturals, for example, 1412612 + ... + 2117147.

It is an arithmetic number, because the mean of its divisors is an integer number (54160637440).

Almost surely, 2^{1243421143412} is an apocalyptic number.

It is an amenable number.

1243421143412 is an abundant number, since it is smaller than the sum of its proper divisors (1356289453708).

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

1243421143412 is a wasteful number, since it uses less digits than its factorization.

1243421143412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3530340 (or 3530338 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

Adding to 1243421143412 its reverse (2143411243421), we get a palindrome (3386832386833).

The spelling of 1243421143412 in words is "one trillion, two hundred forty-three billion, four hundred twenty-one million, one hundred forty-three thousand, four hundred twelve".