11001220101 has 48 divisors (see below), whose sum is σ = 16492170240. Its totient is φ = 7061178240.

The previous prime is 11001220073. The next prime is 11001220127. The reversal of 11001220101 is 10102210011.

It is a happy number.

It is not a de Polignac number, because 11001220101 - 2⁶ = 11001220037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001220501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17108886 + ... + 17109528.

It is an arithmetic number, because the mean of its divisors is an integer number (343586880).

Almost surely, 2^11001220101 is an apocalyptic number.

It is an amenable number.

11001220101 is a deficient number, since it is larger than the sum of its proper divisors (5490950139).

11001220101 is a wasteful number, since it uses less digits than its factorization.

11001220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146 (or 1143 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11001220101 its reverse (10102210011), we get a palindrome (21103430112).

The spelling of 11001220101 in words is "eleven billion, one million, two hundred twenty thousand, one hundred one".