1242420242421 has 16 divisors (see below), whose sum is σ = 1692265356288. Its totient is φ = 810437209200.

The previous prime is 1242420242383. The next prime is 1242420242431.

1242420242421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1242420242421 - 2⁷ = 1242420242293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242420242431) 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, 673215 + ... + 1714076.

It is an arithmetic number, because the mean of its divisors is an integer number (105766584768).

Almost surely, 2^{1242420242421} is an apocalyptic number.

It is an amenable number.

1242420242421 is a deficient number, since it is larger than the sum of its proper divisors (449845113867).

1242420242421 is a wasteful number, since it uses less digits than its factorization.

1242420242421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391032.

The product of its (nonzero) digits is 16384, while the sum is 30.

It can be divided in two parts, 1242420 and 242421, that added together give a palindrome (1484841).

The spelling of 1242420242421 in words is "one trillion, two hundred forty-two billion, four hundred twenty million, two hundred forty-two thousand, four hundred twenty-one".