21231134030442 has 16 divisors (see below), whose sum is σ = 48528306355392. Its totient is φ = 6066038294400.

The previous prime is 21231134030441. The next prime is 21231134030497. The reversal of 21231134030442 is 24403043113212.

It is a super-2 number, since 2×21231134030442² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21231134030441) 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, 252751595559 + ... + 252751595642.

It is an arithmetic number, because the mean of its divisors is an integer number (3033019147212).

Almost surely, 2^{21231134030442} is an apocalyptic number.

21231134030442 is an abundant number, since it is smaller than the sum of its proper divisors (27297172324950).

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

21231134030442 is a wasteful number, since it uses less digits than its factorization.

21231134030442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505503191213.

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

Adding to 21231134030442 its reverse (24403043113212), we get a palindrome (45634177143654).

The spelling of 21231134030442 in words is "twenty-one trillion, two hundred thirty-one billion, one hundred thirty-four million, thirty thousand, four hundred forty-two".