1021272019 has 2 divisors, whose sum is σ = 1021272020. Its totient is φ = 1021272018.

The previous prime is 1021272011. The next prime is 1021272053. The reversal of 1021272019 is 9102721201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021272019 - 2³ = 1021272011 is a prime.

It is a super-2 number, since 2×1021272019² = 2085993073584672722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1021271984 and 1021272002.

It is not a weakly prime, because it can be changed into another prime (1021272011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510636009 + 510636010.

It is an arithmetic number, because the mean of its divisors is an integer number (510636010).

Almost surely, 2^1021272019 is an apocalyptic number.

1021272019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021272019 is an equidigital number, since it uses as much as digits as its factorization.

1021272019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 1021272019 is about 31957.3468704772. The cubic root of 1021272019 is about 1007.0409812301.

The spelling of 1021272019 in words is "one billion, twenty-one million, two hundred seventy-two thousand, nineteen".