21123311433342 has 8 divisors (see below), whose sum is σ = 42246622866696. Its totient is φ = 7041103811112.

The previous prime is 21123311433317. The next prime is 21123311433349. The reversal of 21123311433342 is 24333411332112.

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

21123311433342 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123311433349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1760275952773 + ... + 1760275952784.

It is an arithmetic number, because the mean of its divisors is an integer number (5280827858337).

Almost surely, 2^{21123311433342} is an apocalyptic number.

21123311433342 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21123311433342 is a wasteful number, since it uses less digits than its factorization.

21123311433342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520551905562.

The product of its digits is 31104, while the sum is 33.

Adding to 21123311433342 its reverse (24333411332112), we get a palindrome (45456722765454).

The spelling of 21123311433342 in words is "twenty-one trillion, one hundred twenty-three billion, three hundred eleven million, four hundred thirty-three thousand, three hundred forty-two".