11101210021 has 8 divisors (see below), whose sum is σ = 12126333888. Its totient is φ = 10078740000.

The previous prime is 11101209929. The next prime is 11101210027. The reversal of 11101210021 is 12001210111.

11101210021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11101210021 - 2¹³ = 11101201829 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101210027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 654705 + ... + 671446.

It is an arithmetic number, because the mean of its divisors is an integer number (1515791736).

Almost surely, 2^11101210021 is an apocalyptic number.

11101210021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11101210021 is a deficient number, since it is larger than the sum of its proper divisors (1025123867).

11101210021 is a wasteful number, since it uses less digits than its factorization.

11101210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326923.

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

Adding to 11101210021 its reverse (12001210111), we get a palindrome (23102420132).

It can be divided in two parts, 11101 and 210021, that added together give a palindrome (221122).

The spelling of 11101210021 in words is "eleven billion, one hundred one million, two hundred ten thousand, twenty-one".