11010011212121 has 4 divisors (see below), whose sum is σ = 11052851722932. Its totient is φ = 10967170701312.

The previous prime is 11010011212037. The next prime is 11010011212129. The reversal of 11010011212121 is 12121211001011.

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 7660379172121 + 3349632040000 = 2767739^2 + 1830200^2 .

It is a cyclic number.

It is not a de Polignac number, because 11010011212121 - 2¹⁴ = 11010011195737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11010011212096 and 11010011212105.

It is not an unprimeable number, because it can be changed into a prime (11010011212129) 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, 21420255020 + ... + 21420255533.

It is an arithmetic number, because the mean of its divisors is an integer number (2763212930733).

Almost surely, 2^{11010011212121} is an apocalyptic number.

It is an amenable number.

11010011212121 is a deficient number, since it is larger than the sum of its proper divisors (42840510811).

11010011212121 is an equidigital number, since it uses as much as digits as its factorization.

11010011212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42840510810.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11010011212121 its reverse (12121211001011), we get a palindrome (23131222213132).

The spelling of 11010011212121 in words is "eleven trillion, ten billion, eleven million, two hundred twelve thousand, one hundred twenty-one".