21223201011 has 32 divisors (see below), whose sum is σ = 28983951360. Its totient is φ = 13810475424.

The previous prime is 21223201007. The next prime is 21223201049. The reversal of 21223201011 is 11010232212.

It is not a de Polignac number, because 21223201011 - 2² = 21223201007 is a prime.

It is a super-3 number, since 3×21223201011³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21223201411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12761166 + ... + 12762828.

It is an arithmetic number, because the mean of its divisors is an integer number (905748480).

Almost surely, 2^21223201011 is an apocalyptic number.

21223201011 is a deficient number, since it is larger than the sum of its proper divisors (7760750349).

21223201011 is a wasteful number, since it uses less digits than its factorization.

21223201011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21223201011 its reverse (11010232212), we get a palindrome (32233433223).

The spelling of 21223201011 in words is "twenty-one billion, two hundred twenty-three million, two hundred one thousand, eleven".