121002305 has 4 divisors (see below), whose sum is σ = 145202772. Its totient is φ = 96801840.

The previous prime is 121002293. The next prime is 121002337. The reversal of 121002305 is 503200121.

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: 503200121 = 10103 ⋅49807.

It can be written as a sum of positive squares in 2 ways, for example, as 25725184 + 95277121 = 5072^2 + 9761^2 .

It is not a de Polignac number, because 121002305 - 2¹⁰ = 121001281 is a prime.

It is a super-3 number, since 3×121002305³ (a number of 25 digits) contains 333 as substring.

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 121002305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12100226 + ... + 12100235.

It is an arithmetic number, because the mean of its divisors is an integer number (36300693).

Almost surely, 2^121002305 is an apocalyptic number.

It is an amenable number.

121002305 is a deficient number, since it is larger than the sum of its proper divisors (24200467).

121002305 is an equidigital number, since it uses as much as digits as its factorization.

121002305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24200466.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 121002305 is about 11000.1047722283. The cubic root of 121002305 is about 494.6118850023.

Adding to 121002305 its reverse (503200121), we get a palindrome (624202426).

The spelling of 121002305 in words is "one hundred twenty-one million, two thousand, three hundred five".