3021020421 has 4 divisors (see below), whose sum is σ = 4028027232. Its totient is φ = 2014013612.

The previous prime is 3021020383. The next prime is 3021020423. The reversal of 3021020421 is 1240201203.

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 3021020421 - 2⁶ = 3021020357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3021020421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3021020423) 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, 503503401 + ... + 503503406.

It is an arithmetic number, because the mean of its divisors is an integer number (1007006808).

Almost surely, 2^3021020421 is an apocalyptic number.

It is an amenable number.

3021020421 is a deficient number, since it is larger than the sum of its proper divisors (1007006811).

3021020421 is a wasteful number, since it uses less digits than its factorization.

3021020421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007006810.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 3021020421 is about 54963.8101026485. The cubic root of 3021020421 is about 1445.6102547258.

Adding to 3021020421 its reverse (1240201203), we get a palindrome (4261221624).

The spelling of 3021020421 in words is "three billion, twenty-one million, twenty thousand, four hundred twenty-one".