11210211212121 has 24 divisors (see below), whose sum is σ = 16321034096640. Its totient is φ = 7414170575616.

The previous prime is 11210211212047. The next prime is 11210211212129. The reversal of 11210211212121 is 12121211201211.

It is a happy number.

11210211212121 is a `hidden beast` number, since 1 + 121 + 0 + 211 + 212 + 121 = 666.

It is not a de Polignac number, because 11210211212121 - 2⁷ = 11210211211993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11210211212094 and 11210211212103.

It is not an unprimeable number, because it can be changed into a prime (11210211212129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18763120 + ... + 19351358.

It is an arithmetic number, because the mean of its divisors is an integer number (680043087360).

Almost surely, 2^{11210211212121} is an apocalyptic number.

It is an amenable number.

11210211212121 is a deficient number, since it is larger than the sum of its proper divisors (5110822884519).

11210211212121 is a wasteful number, since it uses less digits than its factorization.

11210211212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605045 (or 605042 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11210211212121 its reverse (12121211201211), we get a palindrome (23331422413332).

The spelling of 11210211212121 in words is "eleven trillion, two hundred ten billion, two hundred eleven million, two hundred twelve thousand, one hundred twenty-one".