11121120121121 has 4 divisors (see below), whose sum is σ = 11122662372144. Its totient is φ = 11119577870100.

The previous prime is 11121120121081. The next prime is 11121120121123. The reversal of 11121120121121 is 12112102112111.

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 a de Polignac number, because none of the positive numbers 2^k-11121120121121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11121120121121.

It is not an unprimeable number, because it can be changed into a prime (11121120121123) 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, 771114695 + ... + 771129116.

It is an arithmetic number, because the mean of its divisors is an integer number (2780665593036).

Almost surely, 2^{11121120121121} is an apocalyptic number.

It is an amenable number.

11121120121121 is a deficient number, since it is larger than the sum of its proper divisors (1542251023).

11121120121121 is an equidigital number, since it uses as much as digits as its factorization.

11121120121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542251022.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11121120121121 its reverse (12112102112111), we get a palindrome (23233222233232).

The spelling of 11121120121121 in words is "eleven trillion, one hundred twenty-one billion, one hundred twenty million, one hundred twenty-one thousand, one hundred twenty-one".