3012021421 has 2 divisors, whose sum is σ = 3012021422. Its totient is φ = 3012021420.

The previous prime is 3012021407. The next prime is 3012021433. The reversal of 3012021421 is 1241202103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2877786025 + 134235396 = 53645^2 + 11586^2 .

It is an emirp because it is prime and its reverse (1241202103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3012021421 - 2¹⁵ = 3011988653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3012021395 and 3012021404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3012021401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1506010710 + 1506010711.

It is an arithmetic number, because the mean of its divisors is an integer number (1506010711).

Almost surely, 2^3012021421 is an apocalyptic number.

It is an amenable number.

3012021421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3012021421 is an equidigital number, since it uses as much as digits as its factorization.

3012021421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 3012021421 is about 54881.8860918609. The cubic root of 3012021421 is about 1444.1734350005.

Adding to 3012021421 its reverse (1241202103), we get a palindrome (4253223524).

The spelling of 3012021421 in words is "three billion, twelve million, twenty-one thousand, four hundred twenty-one".