121303121 has 4 divisors (see below), whose sum is σ = 122504244. Its totient is φ = 120102000.

The previous prime is 121303033. The next prime is 121303141.

121303121 is nontrivially palindromic in base 10.

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 67486225 + 53816896 = 8215^2 + 7336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121303121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121303096 and 121303105.

It is not an unprimeable number, because it can be changed into a prime (121303141) 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, 600410 + ... + 600611.

It is an arithmetic number, because the mean of its divisors is an integer number (30626061).

Almost surely, 2^121303121 is an apocalyptic number.

It is an amenable number.

121303121 is a deficient number, since it is larger than the sum of its proper divisors (1201123).

121303121 is a wasteful number, since it uses less digits than its factorization.

121303121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201122.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 121303121 is about 11013.7696089940. The cubic root of 121303121 is about 495.0214200165.

It can be divided in two parts, 12130 and 3121, that added together give a palindrome (15251).

The spelling of 121303121 in words is "one hundred twenty-one million, three hundred three thousand, one hundred twenty-one".