10011111221121 has 4 divisors (see below), whose sum is σ = 13348148294832. Its totient is φ = 6674074147412.

The previous prime is 10011111221117. The next prime is 10011111221131. The reversal of 10011111221121 is 12112211111001.

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 10011111221121 - 2² = 10011111221117 is a prime.

It is a super-3 number, since 3×10011111221121³ (a number of 40 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10011111221121.

It is not an unprimeable number, because it can be changed into a prime (10011111221131) 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, 1668518536851 + ... + 1668518536856.

It is an arithmetic number, because the mean of its divisors is an integer number (3337037073708).

Almost surely, 2^{10011111221121} is an apocalyptic number.

It is an amenable number.

10011111221121 is a deficient number, since it is larger than the sum of its proper divisors (3337037073711).

10011111221121 is an equidigital number, since it uses as much as digits as its factorization.

10011111221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3337037073710.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 10011111221121 its reverse (12112211111001), we get a palindrome (22123322332122).

The spelling of 10011111221121 in words is "ten trillion, eleven billion, one hundred eleven million, two hundred twenty-one thousand, one hundred twenty-one".