12021013 has 2 divisors, whose sum is σ = 12021014.
Its totient is φ = 12021012.
The previous prime is 12021007. The next prime is 12021017. The reversal of 12021013 is 31012021.
Adding to 12021013 its reverse (31012021), we get a palindrome (43033034).
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 10387729 + 1633284 = 3223^2 + 1278^2
It is an emirp because it is prime and its reverse (31012021) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 12021013 - 221 = 9923861 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (12021017) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010506 + 6010507.
It is an arithmetic number, because the mean of its divisors is an integer number (6010507).
Almost surely, 212021013 is an apocalyptic number.
It is an amenable number.
12021013 is a deficient number, since it is larger than the sum of its proper divisors (1).
12021013 is an equidigital number, since it uses as much as digits as its factorization.
12021013 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 12, while the sum is 10.
The square root of 12021013 is about 3467.1332538569.
The cubic root of 12021013 is about 229.0764032546.
The spelling of 12021013 in words is "twelve million, twenty-one thousand, thirteen".