11101001001 has 16 divisors (see below), whose sum is σ = 14959375488. Its totient is φ = 7321760000.

The previous prime is 11101000993. The next prime is 11101001029. The reversal of 11101001001 is 10010010111.

It is a cyclic number.

It is not a de Polignac number, because 11101001001 - 2³ = 11101000993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11101011001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400801 + ... + 427601.

It is an arithmetic number, because the mean of its divisors is an integer number (934960968).

Almost surely, 2^11101001001 is an apocalyptic number.

It is an amenable number.

11101001001 is a deficient number, since it is larger than the sum of its proper divisors (3858374487).

11101001001 is a wasteful number, since it uses less digits than its factorization.

11101001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28272.

The product of its (nonzero) digits is 1, while the sum is 6.

Adding to 11101001001 its reverse (10010010111), we get a palindrome (21111011112).

The spelling of 11101001001 in words is "eleven billion, one hundred one million, one thousand, one".