211330121369 has 2 divisors, whose sum is σ = 211330121370. Its totient is φ = 211330121368.

The previous prime is 211330121309. The next prime is 211330121371. The reversal of 211330121369 is 963121033112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162671055625 + 48659065744 = 403325^2 + 220588^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211330121369 is a prime.

It is a super-2 number, since 2×211330121369² (a number of 23 digits) contains 22 as substring.

Together with 211330121371, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211330121309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105665060684 + 105665060685.

It is an arithmetic number, because the mean of its divisors is an integer number (105665060685).

Almost surely, 2^211330121369 is an apocalyptic number.

It is an amenable number.

211330121369 is a deficient number, since it is larger than the sum of its proper divisors (1).

211330121369 is an equidigital number, since it uses as much as digits as its factorization.

211330121369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The spelling of 211330121369 in words is "two hundred eleven billion, three hundred thirty million, one hundred twenty-one thousand, three hundred sixty-nine".