11100211021021 has 4 divisors (see below), whose sum is σ = 11108145412000. Its totient is φ = 11092276630044.

The previous prime is 11100211021019. The next prime is 11100211021049. The reversal of 11100211021021 is 12012011200111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11100211021021 - 2¹ = 11100211021019 is a prime.

It is a super-2 number, since 2×11100211021021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11100211020992 and 11100211021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100211021061) 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, 3967193391 + ... + 3967196188.

It is an arithmetic number, because the mean of its divisors is an integer number (2777036353000).

Almost surely, 2^{11100211021021} is an apocalyptic number.

It is an amenable number.

11100211021021 is a deficient number, since it is larger than the sum of its proper divisors (7934390979).

11100211021021 is an equidigital number, since it uses as much as digits as its factorization.

11100211021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7934390978.

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

Adding to 11100211021021 its reverse (12012011200111), we get a palindrome (23112222221132).

The spelling of 11100211021021 in words is "eleven trillion, one hundred billion, two hundred eleven million, twenty-one thousand, twenty-one".