11100401021 has 8 divisors (see below), whose sum is σ = 11508096600. Its totient is φ = 10694367040.

The previous prime is 11100400999. The next prime is 11100401029. The reversal of 11100401021 is 12010400111.

It can be written as a sum of positive squares in 4 ways, for example, as 4110604996 + 6989796025 = 64114^2 + 83605^2 .

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 11100401021 - 2¹⁸ = 11100138877 is a prime.

It is a super-3 number, since 3×11100401021³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11100400993 and 11100401011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100401029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401786 + ... + 428523.

It is an arithmetic number, because the mean of its divisors is an integer number (1438512075).

Almost surely, 2^11100401021 is an apocalyptic number.

It is an amenable number.

11100401021 is a deficient number, since it is larger than the sum of its proper divisors (407695579).

11100401021 is an equidigital number, since it uses as much as digits as its factorization.

11100401021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830799.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11100401021 its reverse (12010400111), we get a palindrome (23110801132).

The spelling of 11100401021 in words is "eleven billion, one hundred million, four hundred one thousand, twenty-one".