21030310011 has 8 divisors (see below), whose sum is σ = 28692516160. Its totient is φ = 13694155272.

The previous prime is 21030309959. The next prime is 21030310013. The reversal of 21030310011 is 11001303012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21030310011 - 2⁶ = 21030309947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21030310013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81512701 + ... + 81512958.

It is an arithmetic number, because the mean of its divisors is an integer number (3586564520).

Almost surely, 2^21030310011 is an apocalyptic number.

21030310011 is a deficient number, since it is larger than the sum of its proper divisors (7662206149).

21030310011 is a wasteful number, since it uses less digits than its factorization.

21030310011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163025705.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 21030310011 its reverse (11001303012), we get a palindrome (32031613023).

The spelling of 21030310011 in words is "twenty-one billion, thirty million, three hundred ten thousand, eleven".