3120030121 has 4 divisors (see below), whose sum is σ = 3360032452. Its totient is φ = 2880027792.

The previous prime is 3120030113. The next prime is 3120030167. The reversal of 3120030121 is 1210300213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1210300213 = 227 ⋅5331719.

It can be written as a sum of positive squares in 2 ways, for example, as 576240025 + 2543790096 = 24005^2 + 50436^2 .

It is a cyclic number.

It is not a de Polignac number, because 3120030121 - 2³ = 3120030113 is a prime.

It is a super-3 number, since 3×3120030121³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 240002317 = 3120030121 / (3 + 1 + 2 + 0 + 0 + 3 + 0 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3120030181) 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, 120001146 + ... + 120001171.

It is an arithmetic number, because the mean of its divisors is an integer number (840008113).

Almost surely, 2^3120030121 is an apocalyptic number.

It is an amenable number.

3120030121 is a deficient number, since it is larger than the sum of its proper divisors (240002331).

3120030121 is a wasteful number, since it uses less digits than its factorization.

3120030121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240002330.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 3120030121 is about 55857.2298006265. The cubic root of 3120030121 is about 1461.2334171126.

Adding to 3120030121 its reverse (1210300213), we get a palindrome (4330330334).

The spelling of 3120030121 in words is "three billion, one hundred twenty million, thirty thousand, one hundred twenty-one".