3029021221 has 4 divisors (see below), whose sum is σ = 3029143392. Its totient is φ = 3028899052.

The previous prime is 3029021201. The next prime is 3029021227. The reversal of 3029021221 is 1221209203.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3029021221 - 2²⁷ = 2894803493 is a prime.

It is a super-3 number, since 3×3029021221³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3029021192 and 3029021201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3029021227) 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, 9211 + ... + 78376.

It is an arithmetic number, because the mean of its divisors is an integer number (757285848).

Almost surely, 2^3029021221 is an apocalyptic number.

It is an amenable number.

3029021221 is a deficient number, since it is larger than the sum of its proper divisors (122171).

3029021221 is an equidigital number, since it uses as much as digits as its factorization.

3029021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122170.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 3029021221 is about 55036.5444136893. The cubic root of 3029021221 is about 1446.8853032749.

The spelling of 3029021221 in words is "three billion, twenty-nine million, twenty-one thousand, two hundred twenty-one".