11100201021 has 48 divisors (see below), whose sum is σ = 20267089024. Its totient is φ = 5696790912.

The previous prime is 11100200999. The next prime is 11100201023. The reversal of 11100201021 is 12010200111.

It is a happy number.

It is not a de Polignac number, because 11100201021 - 2¹¹ = 11100198973 is a prime.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11100200994 and 11100201012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100201023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 152851 + ... + 213456.

Almost surely, 2^11100201021 is an apocalyptic number.

It is an amenable number.

11100201021 is a deficient number, since it is larger than the sum of its proper divisors (9166888003).

11100201021 is a wasteful number, since it uses less digits than its factorization.

11100201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366370 (or 366367 counting only the distinct ones).

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

Adding to 11100201021 its reverse (12010200111), we get a palindrome (23110401132).

The spelling of 11100201021 in words is "eleven billion, one hundred million, two hundred one thousand, twenty-one".