1242142121424 has 80 divisors (see below), whose sum is σ = 3256731680832. Its totient is φ = 407899582464.

The previous prime is 1242142121399. The next prime is 1242142121449. The reversal of 1242142121424 is 4241212412421.

It is an interprime number because it is at equal distance from previous prime (1242142121399) and next prime (1242142121449).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1242142121391 and 1242142121400.

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, 964734 + ... + 1847970.

Almost surely, 2^{1242142121424} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242142121424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1628365840416).

1242142121424 is an abundant number, since it is smaller than the sum of its proper divisors (2014589559408).

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

1242142121424 is a wasteful number, since it uses less digits than its factorization.

1242142121424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883684 (or 883678 counting only the distinct ones).

The product of its digits is 8192, while the sum is 30.

Adding to 1242142121424 its reverse (4241212412421), we get a palindrome (5483354533845).

The spelling of 1242142121424 in words is "one trillion, two hundred forty-two billion, one hundred forty-two million, one hundred twenty-one thousand, four hundred twenty-four".