11101201021 has 8 divisors (see below), whose sum is σ = 11201748984. Its totient is φ = 11000693760.

The previous prime is 11101200883. The next prime is 11101201037. The reversal of 11101201021 is 12010210111.

It can be written as a sum of positive squares in 4 ways, for example, as 955675396 + 10145525625 = 30914^2 + 100725^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11101201021 - 2²⁹ = 10564330109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11101200989 and 11101201007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101201721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907075 + ... + 919231.

It is an arithmetic number, because the mean of its divisors is an integer number (1400218623).

Almost surely, 2^11101201021 is an apocalyptic number.

It is an amenable number.

11101201021 is a deficient number, since it is larger than the sum of its proper divisors (100547963).

11101201021 is a wasteful number, since it uses less digits than its factorization.

11101201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20351.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11101201021 its reverse (12010210111), we get a palindrome (23111411132).

The spelling of 11101201021 in words is "eleven billion, one hundred one million, two hundred one thousand, twenty-one".