21101230011 has 16 divisors (see below), whose sum is σ = 28286679168. Its totient is φ = 13991779200.

The previous prime is 21101229979. The next prime is 21101230013. The reversal of 21101230011 is 11003210112.

It is not a de Polignac number, because 21101230011 - 2⁵ = 21101229979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21101230013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 580276 + ... + 615566.

It is an arithmetic number, because the mean of its divisors is an integer number (1767917448).

Almost surely, 2^21101230011 is an apocalyptic number.

21101230011 is a deficient number, since it is larger than the sum of its proper divisors (7185449157).

21101230011 is a wasteful number, since it uses less digits than its factorization.

21101230011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36362.

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

Adding to 21101230011 its reverse (11003210112), we get a palindrome (32104440123).

The spelling of 21101230011 in words is "twenty-one billion, one hundred one million, two hundred thirty thousand, eleven".