210111022221109 has 2 divisors, whose sum is σ = 210111022221110. Its totient is φ = 210111022221108.

The previous prime is 210111022221097. The next prime is 210111022221119. The reversal of 210111022221109 is 901122220111012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141932197060900 + 68178825160209 = 11913530^2 + 8257047^2 .

It is a cyclic number.

It is not a de Polignac number, because 210111022221109 - 2⁴⁵ = 174926650132277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210111022221119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105055511110554 + 105055511110555.

It is an arithmetic number, because the mean of its divisors is an integer number (105055511110555).

Almost surely, 2^{210111022221109} is an apocalyptic number.

It is an amenable number.

210111022221109 is a deficient number, since it is larger than the sum of its proper divisors (1).

210111022221109 is an equidigital number, since it uses as much as digits as its factorization.

210111022221109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 210111022221109 in words is "two hundred ten trillion, one hundred eleven billion, twenty-two million, two hundred twenty-one thousand, one hundred nine".