12021019489 has 2 divisors, whose sum is σ = 12021019490. Its totient is φ = 12021019488.

The previous prime is 12021019453. The next prime is 12021019501. The reversal of 12021019489 is 98491012021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10807681600 + 1213337889 = 103960^2 + 34833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021019489 is a prime.

It is a super-2 number, since 2×12021019489² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12021019289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010509744 + 6010509745.

It is an arithmetic number, because the mean of its divisors is an integer number (6010509745).

Almost surely, 2^12021019489 is an apocalyptic number.

It is an amenable number.

12021019489 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021019489 is an equidigital number, since it uses as much as digits as its factorization.

12021019489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 12021019489 in words is "twelve billion, twenty-one million, nineteen thousand, four hundred eighty-nine".