21111240433342 has 64 divisors (see below), whose sum is σ = 32880607119360. Its totient is φ = 10157928270336.

The previous prime is 21111240433307. The next prime is 21111240433403. The reversal of 21111240433342 is 24333404211112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7927614303 + ... + 7927616965.

It is an arithmetic number, because the mean of its divisors is an integer number (513759486240).

Almost surely, 2^{21111240433342} is an apocalyptic number.

21111240433342 is a deficient number, since it is larger than the sum of its proper divisors (11769366686018).

21111240433342 is a wasteful number, since it uses less digits than its factorization.

21111240433342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5465.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 21111240433342 its reverse (24333404211112), we get a palindrome (45444644644454).

The spelling of 21111240433342 in words is "twenty-one trillion, one hundred eleven billion, two hundred forty million, four hundred thirty-three thousand, three hundred forty-two".