21142102030144 has 14 divisors (see below), whose sum is σ = 41953858716194. Its totient is φ = 10571051015040.

The previous prime is 21142102030141. The next prime is 21142102030193. The reversal of 21142102030144 is 44103020124112.

It can be written as a sum of positive squares in only one way, i.e., 20760780960000 + 381321070144 = 4556400^2 + 617512^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142102030141) 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 as a sum of consecutive naturals, namely, 165172672047 + ... + 165172672174.

Almost surely, 2^{21142102030144} is an apocalyptic number.

It is an amenable number.

21142102030144 is a deficient number, since it is larger than the sum of its proper divisors (20811756686050).

21142102030144 is an equidigital number, since it uses as much as digits as its factorization.

21142102030144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330345344233 (or 330345344223 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21142102030144 its reverse (44103020124112), we get a palindrome (65245122154256).

The spelling of 21142102030144 in words is "twenty-one trillion, one hundred forty-two billion, one hundred two million, thirty thousand, one hundred forty-four".