121221103133 has 4 divisors (see below), whose sum is σ = 130545803388. Its totient is φ = 111896402880.

The previous prime is 121221103117. The next prime is 121221103141. The reversal of 121221103133 is 331301122121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331301122121 = 145361 ⋅2279161.

It can be written as a sum of positive squares in 2 ways, for example, as 66137951929 + 55083151204 = 257173^2 + 234698^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221103133 - 2⁴ = 121221103117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221133133) 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, 4662350108 + ... + 4662350133.

It is an arithmetic number, because the mean of its divisors is an integer number (32636450847).

Almost surely, 2^121221103133 is an apocalyptic number.

121221103133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121221103133 is a deficient number, since it is larger than the sum of its proper divisors (9324700255).

121221103133 is an equidigital number, since it uses as much as digits as its factorization.

121221103133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9324700254.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121221103133 its reverse (331301122121), we get a palindrome (452522225254).

The spelling of 121221103133 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred three thousand, one hundred thirty-three".