21110302011 has 16 divisors (see below), whose sum is σ = 29397772800. Its totient is φ = 13461077088.

The previous prime is 21110302009. The next prime is 21110302019. The reversal of 21110302011 is 11020301112.

It is not a de Polignac number, because 21110302011 - 2¹ = 21110302009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110302019) 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, 1605171 + ... + 1618268.

It is an arithmetic number, because the mean of its divisors is an integer number (1837360800).

Almost surely, 2^21110302011 is an apocalyptic number.

21110302011 is a deficient number, since it is larger than the sum of its proper divisors (8287470789).

21110302011 is a wasteful number, since it uses less digits than its factorization.

21110302011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223538.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21110302011 its reverse (11020301112), we get a palindrome (32130603123).

The spelling of 21110302011 in words is "twenty-one billion, one hundred ten million, three hundred two thousand, eleven".