10201111111 has 2 divisors, whose sum is σ = 10201111112. Its totient is φ = 10201111110.

The previous prime is 10201111093. The next prime is 10201111121. The reversal of 10201111111 is 11111110201.

It is an a-pointer prime, because the next prime (10201111121) can be obtained adding 10201111111 to its sum of digits (10).

It is a strong prime.

It is an emirp because it is prime and its reverse (11111110201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10201111111 - 2⁹ = 10201110599 is a prime.

It is a super-3 number, since 3×10201111111³ (a number of 31 digits) contains 333 as substring.

10201111111 is a modest number, since divided by 111111 gives 10201 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10201111121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100555555 + 5100555556.

It is an arithmetic number, because the mean of its divisors is an integer number (5100555556).

Almost surely, 2^10201111111 is an apocalyptic number.

10201111111 is a deficient number, since it is larger than the sum of its proper divisors (1).

10201111111 is an equidigital number, since it uses as much as digits as its factorization.

10201111111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 10201111111 its reverse (11111110201), we get a palindrome (21312221312).

It can be divided in two parts, 10201 and 111111, that multiplied together give a palindrome (1133443311).

The spelling of 10201111111 in words is "ten billion, two hundred one million, one hundred eleven thousand, one hundred eleven".