1111111202101 has 2 divisors, whose sum is σ = 1111111202102. Its totient is φ = 1111111202100.

The previous prime is 1111111202083. The next prime is 1111111202153. The reversal of 1111111202101 is 1012021111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 578247701476 + 532863500625 = 760426^2 + 729975^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111111202101 - 2⁹ = 1111111201589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111111202171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555555601050 + 555555601051.

It is an arithmetic number, because the mean of its divisors is an integer number (555555601051).

Almost surely, 2^{1111111202101} is an apocalyptic number.

It is an amenable number.

1111111202101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111111202101 is an equidigital number, since it uses as much as digits as its factorization.

1111111202101 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 13.

Adding to 1111111202101 its reverse (1012021111111), we get a palindrome (2123132313212).

The spelling of 1111111202101 in words is "one trillion, one hundred eleven billion, one hundred eleven million, two hundred two thousand, one hundred one".