11212210100021 has 4 divisors (see below), whose sum is σ = 12813954400032. Its totient is φ = 9610465800012.

The previous prime is 11212210099991. The next prime is 11212210100051. The reversal of 11212210100021 is 12000101221211.

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 an interprime number because it is at equal distance from previous prime (11212210099991) and next prime (11212210100051).

It is a de Polignac number, because none of the positive numbers 2^k-11212210100021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11212210099969 and 11212210100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212210100051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800872149995 + ... + 800872150008.

It is an arithmetic number, because the mean of its divisors is an integer number (3203488600008).

Almost surely, 2^{11212210100021} is an apocalyptic number.

It is an amenable number.

11212210100021 is a deficient number, since it is larger than the sum of its proper divisors (1601744300011).

11212210100021 is an equidigital number, since it uses as much as digits as its factorization.

11212210100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601744300010.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11212210100021 its reverse (12000101221211), we get a palindrome (23212311321232).

The spelling of 11212210100021 in words is "eleven trillion, two hundred twelve billion, two hundred ten million, one hundred thousand, twenty-one".