21111034 has 16 divisors (see below), whose sum is σ = 36279936. Its totient is φ = 9025200.

The previous prime is 21111029. The next prime is 21111049. The reversal of 21111034 is 43011112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4819 + ... + 8089.

It is an arithmetic number, because the mean of its divisors is an integer number (2267496).

Almost surely, 2^21111034 is an apocalyptic number.

21111034 is a deficient number, since it is larger than the sum of its proper divisors (15168902).

21111034 is a wasteful number, since it uses less digits than its factorization.

21111034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 21111034 is about 4594.6745260138. The cubic root of 21111034 is about 276.3778082254.

Adding to 21111034 its reverse (43011112), we get a palindrome (64122146).

The spelling of 21111034 in words is "twenty-one million, one hundred eleven thousand, thirty-four".