211320214121 has 2 divisors, whose sum is σ = 211320214122. Its totient is φ = 211320214120.

The previous prime is 211320214099. The next prime is 211320214123. The reversal of 211320214121 is 121412023112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113313024400 + 98007189721 = 336620^2 + 313061^2 .

It is a cyclic number.

It is not a de Polignac number, because 211320214121 - 2²⁶ = 211253105257 is a prime.

It is a super-2 number, since 2×211320214121² (a number of 23 digits) contains 22 as substring.

Together with 211320214123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 211320214093 and 211320214102.

It is not a weakly prime, because it can be changed into another prime (211320214123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105660107060 + 105660107061.

It is an arithmetic number, because the mean of its divisors is an integer number (105660107061).

Almost surely, 2^211320214121 is an apocalyptic number.

It is an amenable number.

211320214121 is a deficient number, since it is larger than the sum of its proper divisors (1).

211320214121 is an equidigital number, since it uses as much as digits as its factorization.

211320214121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 211320214121 its reverse (121412023112), we get a palindrome (332732237233).

The spelling of 211320214121 in words is "two hundred eleven billion, three hundred twenty million, two hundred fourteen thousand, one hundred twenty-one".