1210111100201 has 2 divisors, whose sum is σ = 1210111100202. Its totient is φ = 1210111100200.

The previous prime is 1210111100197. The next prime is 1210111100239. The reversal of 1210111100201 is 1020011110121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1011836821801 + 198274278400 = 1005901^2 + 445280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210111100201 - 2² = 1210111100197 is a prime.

It is not a weakly prime, because it can be changed into another prime (1210111100801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605055550100 + 605055550101.

It is an arithmetic number, because the mean of its divisors is an integer number (605055550101).

Almost surely, 2^{1210111100201} is an apocalyptic number.

It is an amenable number.

1210111100201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210111100201 is an equidigital number, since it uses as much as digits as its factorization.

1210111100201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1210111100201 its reverse (1020011110121), we get a palindrome (2230122210322).

The spelling of 1210111100201 in words is "one trillion, two hundred ten billion, one hundred eleven million, one hundred thousand, two hundred one".