11202000021 has 6 divisors (see below), whose sum is σ = 16180666710. Its totient is φ = 7468000008.

The previous prime is 11201999999. The next prime is 11202000049. The reversal of 11202000021 is 12000020211.

It can be written as a sum of positive squares in only one way, i.e., 8298299025 + 2903700996 = 91095^2 + 53886^2 .

It is not a de Polignac number, because 11202000021 - 2⁵ = 11201999989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1244666669 = 11202000021 / (1 + 1 + 2 + 0 + 2 + 0 + 0 + 0 + 0 + 2 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 11201999967 and 11202000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11202000421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 622333326 + ... + 622333343.

It is an arithmetic number, because the mean of its divisors is an integer number (2696777785).

Almost surely, 2^11202000021 is an apocalyptic number.

It is an amenable number.

11202000021 is a deficient number, since it is larger than the sum of its proper divisors (4978666689).

11202000021 is a wasteful number, since it uses less digits than its factorization.

11202000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244666675 (or 1244666672 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 11202000021 its reverse (12000020211), we get a palindrome (23202020232).

The spelling of 11202000021 in words is "eleven billion, two hundred two million, twenty-one", and thus it is an aban number.