121003145 has 16 divisors (see below), whose sum is σ = 149022720. Its totient is φ = 94277184.

The previous prime is 121003123. The next prime is 121003231. The reversal of 121003145 is 541300121.

It is a cyclic number.

It is not a de Polignac number, because 121003145 - 2¹⁰ = 121002121 is a prime.

It is a super-2 number, since 2×121003145² = 29283522199782050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51251 + ... + 53559.

It is an arithmetic number, because the mean of its divisors is an integer number (9313920).

Almost surely, 2^121003145 is an apocalyptic number.

It is an amenable number.

121003145 is a deficient number, since it is larger than the sum of its proper divisors (28019575).

121003145 is a wasteful number, since it uses less digits than its factorization.

121003145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2584.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 121003145 is about 11000.1429536166. The cubic root of 121003145 is about 494.6130295343.

Adding to 121003145 its reverse (541300121), we get a palindrome (662303266).

The spelling of 121003145 in words is "one hundred twenty-one million, three thousand, one hundred forty-five".