211021200110197 has 2 divisors, whose sum is σ = 211021200110198. Its totient is φ = 211021200110196.

The previous prime is 211021200110167. The next prime is 211021200110263. The reversal of 211021200110197 is 791011002120112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210298548802276 + 722651307921 = 14501674^2 + 850089^2 .

It is a cyclic number.

It is not a de Polignac number, because 211021200110197 - 2¹¹ = 211021200108149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211021200110167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105510600055098 + 105510600055099.

It is an arithmetic number, because the mean of its divisors is an integer number (105510600055099).

Almost surely, 2^{211021200110197} is an apocalyptic number.

It is an amenable number.

211021200110197 is a deficient number, since it is larger than the sum of its proper divisors (1).

211021200110197 is an equidigital number, since it uses as much as digits as its factorization.

211021200110197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 28.

The spelling of 211021200110197 in words is "two hundred eleven trillion, twenty-one billion, two hundred million, one hundred ten thousand, one hundred ninety-seven".