1012021019 has 2 divisors, whose sum is σ = 1012021020. Its totient is φ = 1012021018.

The previous prime is 1012021001. The next prime is 1012021027. The reversal of 1012021019 is 9101202101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012021019 is a prime.

It is a super-2 number, since 2×1012021019² = 2048373085795596722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1012020988 and 1012021006.

It is not a weakly prime, because it can be changed into another prime (1012021069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506010509 + 506010510.

It is an arithmetic number, because the mean of its divisors is an integer number (506010510).

Almost surely, 2^1012021019 is an apocalyptic number.

1012021019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012021019 is an equidigital number, since it uses as much as digits as its factorization.

1012021019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 1012021019 is about 31812.2778027604. The cubic root of 1012021019 is about 1003.9910566099.

The spelling of 1012021019 in words is "one billion, twelve million, twenty-one thousand, nineteen".