121120011221 has 48 divisors (see below), whose sum is σ = 139086689280. Its totient is φ = 104528642400.

The previous prime is 121120011209. The next prime is 121120011241. The reversal of 121120011221 is 122110021121.

It is not a de Polignac number, because 121120011221 - 2⁶ = 121120011157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121120011196 and 121120011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120011241) 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 47 ways as a sum of consecutive naturals, for example, 188366726 + ... + 188367368.

It is an arithmetic number, because the mean of its divisors is an integer number (2897639360).

Almost surely, 2^121120011221 is an apocalyptic number.

121120011221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121120011221 is a deficient number, since it is larger than the sum of its proper divisors (17966678059).

121120011221 is an equidigital number, since it uses as much as digits as its factorization.

121120011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121120011221 its reverse (122110021121), we get a palindrome (243230032342).

The spelling of 121120011221 in words is "one hundred twenty-one billion, one hundred twenty million, eleven thousand, two hundred twenty-one".