21134320422042 has 32 divisors (see below), whose sum is σ = 42775110374400. Its totient is φ = 6960856969280.

The previous prime is 21134320422023. The next prime is 21134320422091. The reversal of 21134320422042 is 24022402343112.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 61714533 + ... + 62056040.

It is an arithmetic number, because the mean of its divisors is an integer number (1336722199200).

Almost surely, 2^{21134320422042} is an apocalyptic number.

21134320422042 is an abundant number, since it is smaller than the sum of its proper divisors (21640789952358).

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

21134320422042 is a wasteful number, since it uses less digits than its factorization.

21134320422042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123770918.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 21134320422042 its reverse (24022402343112), we get a palindrome (45156722765154).

The spelling of 21134320422042 in words is "twenty-one trillion, one hundred thirty-four billion, three hundred twenty million, four hundred twenty-two thousand, forty-two".