11200111021021 has 4 divisors (see below), whose sum is σ = 12061658022652. Its totient is φ = 10338564019392.

The previous prime is 11200111021007. The next prime is 11200111021031. The reversal of 11200111021021 is 12012011100211.

It is a happy number.

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 2056829247225 + 9143281773796 = 1434165^2 + 3023786^2 .

It is a cyclic number.

It is not a de Polignac number, because 11200111021021 - 2²¹ = 11200108923869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 861547001617 = 11200111021021 / (1 + 1 + 2 + 0 + 0 + 1 + 1 + 1 + 0 + 2 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11200111020992 and 11200111021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11200111021031) 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, 430773500796 + ... + 430773500821.

It is an arithmetic number, because the mean of its divisors is an integer number (3015414505663).

Almost surely, 2^{11200111021021} is an apocalyptic number.

It is an amenable number.

11200111021021 is a deficient number, since it is larger than the sum of its proper divisors (861547001631).

11200111021021 is an equidigital number, since it uses as much as digits as its factorization.

11200111021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861547001630.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11200111021021 its reverse (12012011100211), we get a palindrome (23212122121232).

The spelling of 11200111021021 in words is "eleven trillion, two hundred billion, one hundred eleven million, twenty-one thousand, twenty-one".