11210210021 has 4 divisors (see below), whose sum is σ = 11216017344. Its totient is φ = 11204402700.

The previous prime is 11210210017. The next prime is 11210210131. The reversal of 11210210021 is 12001201211.

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 11210210021 - 2² = 11210210017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11210209984 and 11210210011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11210210321) 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, 2900765 + ... + 2904626.

It is an arithmetic number, because the mean of its divisors is an integer number (2804004336).

Almost surely, 2^11210210021 is an apocalyptic number.

It is an amenable number.

11210210021 is a deficient number, since it is larger than the sum of its proper divisors (5807323).

11210210021 is an equidigital number, since it uses as much as digits as its factorization.

11210210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5807322.

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

Adding to 11210210021 its reverse (12001201211), we get a palindrome (23211411232).

The spelling of 11210210021 in words is "eleven billion, two hundred ten million, two hundred ten thousand, twenty-one".