211221232230011 has 4 divisors (see below), whose sum is σ = 211237758432624. Its totient is φ = 211204706027400.

The previous prime is 211221232229963. The next prime is 211221232230053. The reversal of 211221232230011 is 110032232122112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211221232230011 - 2⁶ = 211221232229947 is a prime.

It is a super-2 number, since 2×211221232230011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211221232230611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8263082135 + ... + 8263107696.

It is an arithmetic number, because the mean of its divisors is an integer number (52809439608156).

Almost surely, 2^{211221232230011} is an apocalyptic number.

211221232230011 is a deficient number, since it is larger than the sum of its proper divisors (16526202613).

211221232230011 is a wasteful number, since it uses less digits than its factorization.

211221232230011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16526202612.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 211221232230011 its reverse (110032232122112), we get a palindrome (321253464352123).

The spelling of 211221232230011 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred thirty-two million, two hundred thirty thousand, eleven".