3030121221 has 4 divisors (see below), whose sum is σ = 4040161632. Its totient is φ = 2020080812.

The previous prime is 3030121217. The next prime is 3030121243. The reversal of 3030121221 is 1221210303.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3030121221 - 2² = 3030121217 is a prime.

It is a super-2 number, since 2×3030121221² = 18363269227909061682, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3030121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3030121261) 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, 505020201 + ... + 505020206.

It is an arithmetic number, because the mean of its divisors is an integer number (1010040408).

Almost surely, 2^3030121221 is an apocalyptic number.

It is an amenable number.

3030121221 is a deficient number, since it is larger than the sum of its proper divisors (1010040411).

3030121221 is a wasteful number, since it uses less digits than its factorization.

3030121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010040410.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 3030121221 is about 55046.5368665459. The cubic root of 3030121221 is about 1447.0604292859.

Adding to 3030121221 its reverse (1221210303), we get a palindrome (4251331524).

It can be divided in two parts, 3030 and 121221, that added together give a triangular number (124251 = T₄₉₈).

The spelling of 3030121221 in words is "three billion, thirty million, one hundred twenty-one thousand, two hundred twenty-one".