21110111030 has 16 divisors (see below), whose sum is σ = 38045067984. Its totient is φ = 8433629280.

The previous prime is 21110111003. The next prime is 21110111041. The reversal of 21110111030 is 3011101112.

It is a happy number.

It is a congruent number.

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, 1293377 + ... + 1309596.

It is an arithmetic number, because the mean of its divisors is an integer number (2377816749).

Almost surely, 2^21110111030 is an apocalyptic number.

21110111030 is a deficient number, since it is larger than the sum of its proper divisors (16934956954).

21110111030 is a wasteful number, since it uses less digits than its factorization.

21110111030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603791.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 21110111030 its reverse (3011101112), we get a palindrome (24121212142).

The spelling of 21110111030 in words is "twenty-one billion, one hundred ten million, one hundred eleven thousand, thirty".