211233121005 has 16 divisors (see below), whose sum is σ = 344349843840. Its totient is φ = 110532047808.

The previous prime is 211233120979. The next prime is 211233121007. The reversal of 211233121005 is 500121332112.

It is not a de Polignac number, because 211233121005 - 2²⁷ = 211098903277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211233121007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132850225 + ... + 132851814.

It is an arithmetic number, because the mean of its divisors is an integer number (21521865240).

Almost surely, 2^211233121005 is an apocalyptic number.

It is an amenable number.

211233121005 is a deficient number, since it is larger than the sum of its proper divisors (133116722835).

211233121005 is a wasteful number, since it uses less digits than its factorization.

211233121005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265702100.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 211233121005 its reverse (500121332112), we get a palindrome (711354453117).

The spelling of 211233121005 in words is "two hundred eleven billion, two hundred thirty-three million, one hundred twenty-one thousand, five".