21123423023342 has 8 divisors (see below), whose sum is σ = 31685184822816. Its totient is φ = 10561694749072.

The previous prime is 21123423023333. The next prime is 21123423023357. The reversal of 21123423023342 is 24332032432112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21123423023299 and 21123423023308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6741983 + ... + 9364890.

It is an arithmetic number, because the mean of its divisors is an integer number (3960648102852).

Almost surely, 2^{21123423023342} is an apocalyptic number.

21123423023342 is a deficient number, since it is larger than the sum of its proper divisors (10561761799474).

21123423023342 is a wasteful number, since it uses less digits than its factorization.

21123423023342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16762602.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 21123423023342 its reverse (24332032432112), we get a palindrome (45455455455454).

The spelling of 21123423023342 in words is "twenty-one trillion, one hundred twenty-three billion, four hundred twenty-three million, twenty-three thousand, three hundred forty-two".