21434310120342 has 16 divisors (see below), whose sum is σ = 48992708846592. Its totient is φ = 6124088605800.

The previous prime is 21434310120337. The next prime is 21434310120347. The reversal of 21434310120342 is 24302101343412.

It is an interprime number because it is at equal distance from previous prime (21434310120337) and next prime (21434310120347).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434310120347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255170358534 + ... + 255170358617.

It is an arithmetic number, because the mean of its divisors is an integer number (3062044302912).

Almost surely, 2^{21434310120342} is an apocalyptic number.

21434310120342 is an abundant number, since it is smaller than the sum of its proper divisors (27558398726250).

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

21434310120342 is a wasteful number, since it uses less digits than its factorization.

21434310120342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510340717163.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 21434310120342 its reverse (24302101343412), we get a palindrome (45736411463754).

The spelling of 21434310120342 in words is "twenty-one trillion, four hundred thirty-four billion, three hundred ten million, one hundred twenty thousand, three hundred forty-two".