211121320162021 has 2 divisors, whose sum is σ = 211121320162022. Its totient is φ = 211121320162020.

The previous prime is 211121320161979. The next prime is 211121320162061. The reversal of 211121320162021 is 120261023121112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140322053669121 + 70799266492900 = 11845761^2 + 8414230^2 .

It is a cyclic number.

It is not a de Polignac number, because 211121320162021 - 2³¹ = 211119172678373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211121320162061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560660081010 + 105560660081011.

It is an arithmetic number, because the mean of its divisors is an integer number (105560660081011).

Almost surely, 2^{211121320162021} is an apocalyptic number.

It is an amenable number.

211121320162021 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121320162021 is an equidigital number, since it uses as much as digits as its factorization.

211121320162021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

Adding to 211121320162021 its reverse (120261023121112), we get a palindrome (331382343283133).

The spelling of 211121320162021 in words is "two hundred eleven trillion, one hundred twenty-one billion, three hundred twenty million, one hundred sixty-two thousand, twenty-one".