21111113342 has 8 divisors (see below), whose sum is σ = 34545458232. Its totient is φ = 9595960600.

The previous prime is 21111113327. The next prime is 21111113363. The reversal of 21111113342 is 24331111112.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479798009 + ... + 479798052.

It is an arithmetic number, because the mean of its divisors is an integer number (4318182279).

Almost surely, 2^21111113342 is an apocalyptic number.

21111113342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21111113342 is a deficient number, since it is larger than the sum of its proper divisors (13434344890).

21111113342 is a wasteful number, since it uses less digits than its factorization.

21111113342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959596074.

The product of its digits is 144, while the sum is 20.

Adding to 21111113342 its reverse (24331111112), we get a palindrome (45442224454).

The spelling of 21111113342 in words is "twenty-one billion, one hundred eleven million, one hundred thirteen thousand, three hundred forty-two".