1020212209 has 4 divisors (see below), whose sum is σ = 1028245504. Its totient is φ = 1012178916.

The previous prime is 1020212203. The next prime is 1020212213. The reversal of 1020212209 is 9022120201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1020212209 - 2¹¹ = 1020210161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020212203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4016457 + ... + 4016710.

It is an arithmetic number, because the mean of its divisors is an integer number (257061376).

Almost surely, 2^1020212209 is an apocalyptic number.

It is an amenable number.

1020212209 is a deficient number, since it is larger than the sum of its proper divisors (8033295).

1020212209 is an equidigital number, since it uses as much as digits as its factorization.

1020212209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8033294.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1020212209 is about 31940.7609333278. The cubic root of 1020212209 is about 1006.6925133465.

The spelling of 1020212209 in words is "one billion, twenty million, two hundred twelve thousand, two hundred nine".