21111444042023 has 8 divisors (see below), whose sum is σ = 21234770965008. Its totient is φ = 20988132009664.

The previous prime is 21111444042019. The next prime is 21111444042089. The reversal of 21111444042023 is 32024044411112.

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

It is a cyclic number.

It is not a de Polignac number, because 21111444042023 - 2² = 21111444042019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111444642023) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 872486 + ... + 6556227.

It is an arithmetic number, because the mean of its divisors is an integer number (2654346370626).

Almost surely, 2^{21111444042023} is an apocalyptic number.

21111444042023 is a deficient number, since it is larger than the sum of its proper divisors (123326922985).

21111444042023 is a wasteful number, since it uses less digits than its factorization.

21111444042023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7445313.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 21111444042023 its reverse (32024044411112), we get a palindrome (53135488453135).

The spelling of 21111444042023 in words is "twenty-one trillion, one hundred eleven billion, four hundred forty-four million, forty-two thousand, twenty-three".