211201111321 has 2 divisors, whose sum is σ = 211201111322. Its totient is φ = 211201111320.

The previous prime is 211201111301. The next prime is 211201111343. The reversal of 211201111321 is 123111102112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136464486921 + 74736624400 = 369411^2 + 273380^2 .

It is a cyclic number.

It is not a de Polignac number, because 211201111321 - 2⁷ = 211201111193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211201111295 and 211201111304.

It is not a weakly prime, because it can be changed into another prime (211201111301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105600555660 + 105600555661.

It is an arithmetic number, because the mean of its divisors is an integer number (105600555661).

Almost surely, 2^211201111321 is an apocalyptic number.

It is an amenable number.

211201111321 is a deficient number, since it is larger than the sum of its proper divisors (1).

211201111321 is an equidigital number, since it uses as much as digits as its factorization.

211201111321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 211201111321 its reverse (123111102112), we get a palindrome (334312213433).

The spelling of 211201111321 in words is "two hundred eleven billion, two hundred one million, one hundred eleven thousand, three hundred twenty-one".