21111144034 has 32 divisors (see below), whose sum is σ = 34821458496. Its totient is φ = 9558743040.

The previous prime is 21111144031. The next prime is 21111144083. The reversal of 21111144034 is 43044111112.

It is a junction number, because it is equal to n+sod(n) for n = 21111143996 and 21111144014.

It is not an unprimeable number, because it can be changed into a prime (21111144031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9807 + ... + 205714.

It is an arithmetic number, because the mean of its divisors is an integer number (1088170578).

Almost surely, 2^21111144034 is an apocalyptic number.

21111144034 is a deficient number, since it is larger than the sum of its proper divisors (13710314462).

21111144034 is a wasteful number, since it uses less digits than its factorization.

21111144034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215650.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 21111144034 its reverse (43044111112), we get a palindrome (64155255146).

The spelling of 21111144034 in words is "twenty-one billion, one hundred eleven million, one hundred forty-four thousand, thirty-four".