1021020219 has 6 divisors (see below), whose sum is σ = 1474806996. Its totient is φ = 680680140.

The previous prime is 1021020199. The next prime is 1021020227. The reversal of 1021020219 is 9120201201.

It is not a de Polignac number, because 1021020219 - 2⁹ = 1021019707 is a prime.

It is a super-2 number, since 2×1021020219² = 2084964575213615922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1021020019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56723337 + ... + 56723354.

It is an arithmetic number, because the mean of its divisors is an integer number (245801166).

Almost surely, 2^1021020219 is an apocalyptic number.

1021020219 is a deficient number, since it is larger than the sum of its proper divisors (453786777).

1021020219 is a wasteful number, since it uses less digits than its factorization.

1021020219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113446697 (or 113446694 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1021020219 is about 31953.4070014451. The cubic root of 1021020219 is about 1006.9582106730.

The spelling of 1021020219 in words is "one billion, twenty-one million, twenty thousand, two hundred nineteen".