11110200021 has 12 divisors (see below), whose sum is σ = 16049160972. Its totient is φ = 7406294976.

The previous prime is 11110200001. The next prime is 11110200041. The reversal of 11110200021 is 12000201111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11110200001) and next prime (11110200041).

It can be written as a sum of positive squares in 2 ways, for example, as 5102244900 + 6007955121 = 71430^2 + 77511^2 .

It is not a de Polignac number, because 11110200021 - 2²² = 11106005717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11110199976 and 11110200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11110200001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137625 + ... + 202881.

It is an arithmetic number, because the mean of its divisors is an integer number (1337430081).

Almost surely, 2^11110200021 is an apocalyptic number.

It is an amenable number.

11110200021 is a deficient number, since it is larger than the sum of its proper divisors (4938960951).

11110200021 is a wasteful number, since it uses less digits than its factorization.

11110200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84180 (or 84177 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11110200021 its reverse (12000201111), we get a palindrome (23110401132).

The spelling of 11110200021 in words is "eleven billion, one hundred ten million, two hundred thousand, twenty-one".