21230001011 has 8 divisors (see below), whose sum is σ = 21271480800. Its totient is φ = 21188549952.

The previous prime is 21230000999. The next prime is 21230001017. The reversal of 21230001011 is 11010003212.

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

It is a cyclic number.

It is not a de Polignac number, because 21230001011 - 2⁶ = 21230000947 is a prime.

It is a super-2 number, since 2×21230001011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21230000983 and 21230001001.

It is not an unprimeable number, because it can be changed into a prime (21230001017) 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, 1985666 + ... + 1996328.

It is an arithmetic number, because the mean of its divisors is an integer number (2658935100).

Almost surely, 2^21230001011 is an apocalyptic number.

21230001011 is a deficient number, since it is larger than the sum of its proper divisors (41479789).

21230001011 is a wasteful number, since it uses less digits than its factorization.

21230001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14365.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21230001011 its reverse (11010003212), we get a palindrome (32240004223).

The spelling of 21230001011 in words is "twenty-one billion, two hundred thirty million, one thousand, eleven".