21124011444043 has 4 divisors (see below), whose sum is σ = 21224125242568. Its totient is φ = 21023897645520.

The previous prime is 21124011444037. The next prime is 21124011444073. The reversal of 21124011444043 is 34044411042112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21124011444043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21124011443996 and 21124011444014.

It is not an unprimeable number, because it can be changed into a prime (21124011444073) 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, 50056898946 + ... + 50056899367.

It is an arithmetic number, because the mean of its divisors is an integer number (5306031310642).

Almost surely, 2^{21124011444043} is an apocalyptic number.

21124011444043 is a deficient number, since it is larger than the sum of its proper divisors (100113798525).

21124011444043 is a wasteful number, since it uses less digits than its factorization.

21124011444043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100113798524.

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 21124011444043 its reverse (34044411042112), we get a palindrome (55168422486155).

The spelling of 21124011444043 in words is "twenty-one trillion, one hundred twenty-four billion, eleven million, four hundred forty-four thousand, forty-three".