21023423412242 has 32 divisors (see below), whose sum is σ = 34952698727424. Its totient is φ = 9439386163200.

The previous prime is 21023423412227. The next prime is 21023423412301. The reversal of 21023423412242 is 24221432432012.

It is a junction number, because it is equal to n+sod(n) for n = 21023423412199 and 21023423412208.

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, 140392223 + ... + 140541890.

It is an arithmetic number, because the mean of its divisors is an integer number (1092271835232).

Almost surely, 2^{21023423412242} is an apocalyptic number.

21023423412242 is a deficient number, since it is larger than the sum of its proper divisors (13929275315182).

21023423412242 is a wasteful number, since it uses less digits than its factorization.

21023423412242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280934234.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 21023423412242 its reverse (24221432432012), we get a palindrome (45244855844254).

The spelling of 21023423412242 in words is "twenty-one trillion, twenty-three billion, four hundred twenty-three million, four hundred twelve thousand, two hundred forty-two".