11111200101 has 6 divisors (see below), whose sum is σ = 16049511270. Its totient is φ = 7407466728.

The previous prime is 11111200097. The next prime is 11111200117. The reversal of 11111200101 is 10100211111.

It can be written as a sum of positive squares in only one way, i.e., 5963855076 + 5147345025 = 77226^2 + 71745^2 .

It is not a de Polignac number, because 11111200101 - 2² = 11111200097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1234577789 = 11111200101 / (1 + 1 + 1 + 1 + 1 + 2 + 0 + 0 + 1 + 0 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111200151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 617288886 + ... + 617288903.

It is an arithmetic number, because the mean of its divisors is an integer number (2674918545).

Almost surely, 2^11111200101 is an apocalyptic number.

It is an amenable number.

11111200101 is a deficient number, since it is larger than the sum of its proper divisors (4938311169).

11111200101 is a wasteful number, since it uses less digits than its factorization.

11111200101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234577795 (or 1234577792 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 11111200101 its reverse (10100211111), we get a palindrome (21211411212).

The spelling of 11111200101 in words is "eleven billion, one hundred eleven million, two hundred thousand, one hundred one".