1020022021209 has 4 divisors (see below), whose sum is σ = 1360029361616. Its totient is φ = 680014680804.

The previous prime is 1020022021199. The next prime is 1020022021223. The reversal of 1020022021209 is 9021202200201.

It is a happy number.

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 not a de Polignac number, because 1020022021209 - 2¹⁷ = 1020021890137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020022026209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170003670199 + ... + 170003670204.

It is an arithmetic number, because the mean of its divisors is an integer number (340007340404).

Almost surely, 2^{1020022021209} is an apocalyptic number.

It is an amenable number.

1020022021209 is a deficient number, since it is larger than the sum of its proper divisors (340007340407).

1020022021209 is an equidigital number, since it uses as much as digits as its factorization.

1020022021209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340007340406.

The product of its (nonzero) digits is 288, while the sum is 21.

The spelling of 1020022021209 in words is "one trillion, twenty billion, twenty-two million, twenty-one thousand, two hundred nine".