21243023200142 has 32 divisors (see below), whose sum is σ = 34163152952832. Its totient is φ = 9880906410144.

The previous prime is 21243023200127. The next prime is 21243023200159. The reversal of 21243023200142 is 24100232034212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1335623 + ... + 6653565.

It is an arithmetic number, because the mean of its divisors is an integer number (1067598529776).

Almost surely, 2^{21243023200142} is an apocalyptic number.

21243023200142 is a deficient number, since it is larger than the sum of its proper divisors (12920129752690).

21243023200142 is a wasteful number, since it uses less digits than its factorization.

21243023200142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5320352.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21243023200142 its reverse (24100232034212), we get a palindrome (45343255234354).

The spelling of 21243023200142 in words is "twenty-one trillion, two hundred forty-three billion, twenty-three million, two hundred thousand, one hundred forty-two".