11101021001 has 24 divisors (see below), whose sum is σ = 13484003904. Its totient is φ = 9095301600.

The previous prime is 11101020991. The next prime is 11101021021. The reversal of 11101021001 is 10012010111.

It is a happy number.

It is not a de Polignac number, because 11101021001 - 2¹⁴ = 11101004617 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11101021001.

It is not an unprimeable number, because it can be changed into a prime (11101021021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2491826 + ... + 2496276.

It is an arithmetic number, because the mean of its divisors is an integer number (561833496).

Almost surely, 2^11101021001 is an apocalyptic number.

It is an amenable number.

11101021001 is a deficient number, since it is larger than the sum of its proper divisors (2382982903).

11101021001 is a wasteful number, since it uses less digits than its factorization.

11101021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6701 (or 6694 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 11101021001 its reverse (10012010111), we get a palindrome (21113031112).

The spelling of 11101021001 in words is "eleven billion, one hundred one million, twenty-one thousand, one".