21210233011 has 8 divisors (see below), whose sum is σ = 23202892800. Its totient is φ = 19228316040.

The previous prime is 21210232987. The next prime is 21210233029. The reversal of 21210233011 is 11033201212.

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 21210233011 - 2¹¹ = 21210230963 is a prime.

It is a super-2 number, since 2×21210233011² (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 (21210233071) 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, 2681571 + ... + 2689468.

It is an arithmetic number, because the mean of its divisors is an integer number (2900361600).

Almost surely, 2^21210233011 is an apocalyptic number.

21210233011 is a deficient number, since it is larger than the sum of its proper divisors (1992659789).

21210233011 is a wasteful number, since it uses less digits than its factorization.

21210233011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5371409.

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

Adding to 21210233011 its reverse (11033201212), we get a palindrome (32243434223).

The spelling of 21210233011 in words is "twenty-one billion, two hundred ten million, two hundred thirty-three thousand, eleven".