11200021021 has 16 divisors (see below), whose sum is σ = 12876931584. Its totient is φ = 9542421504.

The previous prime is 11200020977. The next prime is 11200021033. The reversal of 11200021021 is 12012000211.

It is not a de Polignac number, because 11200021021 - 2¹⁷ = 11199889949 is a prime.

It is a Duffinian number.

11200021021 is a modest number, since divided by 21021 gives 11200 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 11200020989 and 11200021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11200024021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2136015 + ... + 2141251.

It is an arithmetic number, because the mean of its divisors is an integer number (804808224).

Almost surely, 2^11200021021 is an apocalyptic number.

It is an amenable number.

11200021021 is a deficient number, since it is larger than the sum of its proper divisors (1676910563).

11200021021 is a wasteful number, since it uses less digits than its factorization.

11200021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7020.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 11200021021 its reverse (12012000211), we get a palindrome (23212021232).

The spelling of 11200021021 in words is "eleven billion, two hundred million, twenty-one thousand, twenty-one".