21441144140042 has 32 divisors (see below), whose sum is σ = 35434138569984. Its totient is φ = 9649139752000.

The previous prime is 21441144140041. The next prime is 21441144140107. The reversal of 21441144140042 is 24004144114412.

It is a junction number, because it is equal to n+sod(n) for n = 21441144139990 and 21441144140008.

It is not an unprimeable number, because it can be changed into a prime (21441144140041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69276428 + ... + 69585240.

It is an arithmetic number, because the mean of its divisors is an integer number (1107316830312).

Almost surely, 2^{21441144140042} is an apocalyptic number.

21441144140042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21441144140042 is a deficient number, since it is larger than the sum of its proper divisors (13992994429942).

21441144140042 is a wasteful number, since it uses less digits than its factorization.

21441144140042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340174.

The product of its (nonzero) digits is 16384, while the sum is 32.

Adding to 21441144140042 its reverse (24004144114412), we get a palindrome (45445288254454).

The spelling of 21441144140042 in words is "twenty-one trillion, four hundred forty-one billion, one hundred forty-four million, one hundred forty thousand, forty-two".