1121120120121 has 4 divisors (see below), whose sum is σ = 1494826826832. Its totient is φ = 747413413412.

The previous prime is 1121120120111. The next prime is 1121120120129. The reversal of 1121120120121 is 1210210211211.

It is a happy number.

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 1121120120121 - 2¹⁹ = 1121119595833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121120120121.

It is not an unprimeable number, because it can be changed into a prime (1121120120129) 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, 186853353351 + ... + 186853353356.

It is an arithmetic number, because the mean of its divisors is an integer number (373706706708).

Almost surely, 2^{1121120120121} is an apocalyptic number.

It is an amenable number.

1121120120121 is a deficient number, since it is larger than the sum of its proper divisors (373706706711).

1121120120121 is an equidigital number, since it uses as much as digits as its factorization.

1121120120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373706706710.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1121120120121 its reverse (1210210211211), we get a palindrome (2331330331332).

The spelling of 1121120120121 in words is "one trillion, one hundred twenty-one billion, one hundred twenty million, one hundred twenty thousand, one hundred twenty-one".