121220120101121 has 4 divisors (see below), whose sum is σ = 121220447901252. Its totient is φ = 121219792300992.

The previous prime is 121220120101097. The next prime is 121220120101183. The reversal of 121220120101121 is 121101021022121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57287702250496 + 63932417850625 = 7568864^2 + 7995775^2 .

It is a cyclic number.

It is not a de Polignac number, because 121220120101121 - 2¹⁰ = 121220120100097 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 121220120101121.

It is not an unprimeable number, because it can be changed into a prime (121220120101721) 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, 163344740 + ... + 164085173.

It is an arithmetic number, because the mean of its divisors is an integer number (30305111975313).

Almost surely, 2^{121220120101121} is an apocalyptic number.

It is an amenable number.

121220120101121 is a deficient number, since it is larger than the sum of its proper divisors (327800131).

121220120101121 is an equidigital number, since it uses as much as digits as its factorization.

121220120101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327800130.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121220120101121 its reverse (121101021022121), we get a palindrome (242321141123242).

The spelling of 121220120101121 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty million, one hundred one thousand, one hundred twenty-one".