21230213011 has 8 divisors (see below), whose sum is σ = 25045781504. Its totient is φ = 17610314760.

The previous prime is 21230213009. The next prime is 21230213023. The reversal of 21230213011 is 11031203212.

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 21230213011 - 2¹ = 21230213009 is a prime.

It is a super-2 number, since 2×21230213011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21230213041) 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, 48917325 + ... + 48917758.

It is an arithmetic number, because the mean of its divisors is an integer number (3130722688).

Almost surely, 2^21230213011 is an apocalyptic number.

21230213011 is a deficient number, since it is larger than the sum of its proper divisors (3815568493).

21230213011 is an equidigital number, since it uses as much as digits as its factorization.

21230213011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97835121.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21230213011 its reverse (11031203212), we get a palindrome (32261416223).

The spelling of 21230213011 in words is "twenty-one billion, two hundred thirty million, two hundred thirteen thousand, eleven".