11205701021 has 8 divisors (see below), whose sum is σ = 11480475384. Its totient is φ = 10930996480.

The previous prime is 11205700981. The next prime is 11205701047. The reversal of 11205701021 is 12010750211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2595902500 + 8609798521 = 50950^2 + 92789^2 .

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 11205701021 - 2¹⁰ = 11205699997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11205700984 and 11205701002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11205701051) 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, 476291 + ... + 499263.

It is an arithmetic number, because the mean of its divisors is an integer number (1435059423).

Almost surely, 2^11205701021 is an apocalyptic number.

It is an amenable number.

11205701021 is a deficient number, since it is larger than the sum of its proper divisors (274774363).

11205701021 is a wasteful number, since it uses less digits than its factorization.

11205701021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34911.

The product of its (nonzero) digits is 140, while the sum is 20.

The spelling of 11205701021 in words is "eleven billion, two hundred five million, seven hundred one thousand, twenty-one".