21111144026 has 48 divisors (see below), whose sum is σ = 38299403520. Its totient is φ = 8692608960.

The previous prime is 21111144013. The next prime is 21111144029. The reversal of 21111144026 is 62044111112.

It is a junction number, because it is equal to n+sod(n) for n = 21111143992 and 21111144010.

It is not an unprimeable number, because it can be changed into a prime (21111144029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 397286 + ... + 447278.

It is an arithmetic number, because the mean of its divisors is an integer number (797904240).

Almost surely, 2^21111144026 is an apocalyptic number.

21111144026 is a deficient number, since it is larger than the sum of its proper divisors (17188259494).

21111144026 is a wasteful number, since it uses less digits than its factorization.

21111144026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50179 (or 50172 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 21111144026 its reverse (62044111112), we get a palindrome (83155255138).

The spelling of 21111144026 in words is "twenty-one billion, one hundred eleven million, one hundred forty-four thousand, twenty-six".