211211231321321 has 64 divisors (see below), whose sum is σ = 284940244592640. Its totient is φ = 151564970880000.

The previous prime is 211211231321309. The next prime is 211211231321323. The reversal of 211211231321321 is 123123132112112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211211231321321 is a prime.

It is a super-2 number, since 2×211211231321321² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211211231321323) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 57268721 + ... + 60845121.

It is an arithmetic number, because the mean of its divisors is an integer number (4452191321760).

Almost surely, 2^{211211231321321} is an apocalyptic number.

It is an amenable number.

211211231321321 is a deficient number, since it is larger than the sum of its proper divisors (73729013271319).

211211231321321 is a wasteful number, since it uses less digits than its factorization.

211211231321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3577566.

The product of its digits is 864, while the sum is 26.

Adding to 211211231321321 its reverse (123123132112112), we get a palindrome (334334363433433).

It can be divided in two parts, 2112112 and 31321321, that added together give a palindrome (33433433).

The spelling of 211211231321321 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred thirty-one million, three hundred twenty-one thousand, three hundred twenty-one".