121023120121 has 4 divisors (see below), whose sum is σ = 121030481572. Its totient is φ = 121015758672.

The previous prime is 121023120089. The next prime is 121023120149. The reversal of 121023120121 is 121021320121.

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 46242201600 + 74780918521 = 215040^2 + 273461^2 .

It is a cyclic number.

It is not a de Polignac number, because 121023120121 - 2⁵ = 121023120089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121023120095 and 121023120104.

It is not an unprimeable number, because it can be changed into a prime (121023120221) 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, 3656010 + ... + 3688963.

It is an arithmetic number, because the mean of its divisors is an integer number (30257620393).

Almost surely, 2^121023120121 is an apocalyptic number.

It is an amenable number.

121023120121 is a deficient number, since it is larger than the sum of its proper divisors (7361451).

121023120121 is an equidigital number, since it uses as much as digits as its factorization.

121023120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7361450.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121023120121 its reverse (121021320121), we get a palindrome (242044440242).

The spelling of 121023120121 in words is "one hundred twenty-one billion, twenty-three million, one hundred twenty thousand, one hundred twenty-one".