11012001100021 has 4 divisors (see below), whose sum is σ = 11028864808332. Its totient is φ = 10995137391712.

The previous prime is 11012001099941. The next prime is 11012001100039. The reversal of 11012001100021 is 12000110021011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4417962591025 + 6594038508996 = 2101895^2 + 2567886^2 .

It is a cyclic number.

It is not a de Polignac number, because 11012001100021 - 2¹⁵ = 11012001067253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11012001099980 and 11012001100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012001100091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8431853176 + ... + 8431854481.

It is an arithmetic number, because the mean of its divisors is an integer number (2757216202083).

Almost surely, 2^{11012001100021} is an apocalyptic number.

It is an amenable number.

11012001100021 is a deficient number, since it is larger than the sum of its proper divisors (16863708311).

11012001100021 is an equidigital number, since it uses as much as digits as its factorization.

11012001100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16863708310.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11012001100021 its reverse (12000110021011), we get a palindrome (23012111121032).

The spelling of 11012001100021 in words is "eleven trillion, twelve billion, one million, one hundred thousand, twenty-one".