1220100000209 has 8 divisors (see below), whose sum is σ = 1238305694760. Its totient is φ = 1201934630016.

The previous prime is 1220100000193. The next prime is 1220100000247. The reversal of 1220100000209 is 9020000010221.

It can be written as a sum of positive squares in 4 ways, for example, as 32592886225 + 1187507113984 = 180535^2 + 1089728^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220100000209 - 2⁴ = 1220100000193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220100000269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10020122 + ... + 10141155.

It is an arithmetic number, because the mean of its divisors is an integer number (154788211845).

Almost surely, 2^{1220100000209} is an apocalyptic number.

It is an amenable number.

1220100000209 is a deficient number, since it is larger than the sum of its proper divisors (18205694551).

1220100000209 is an equidigital number, since it uses as much as digits as its factorization.

1220100000209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20162179.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 1220100000209 in words is "one trillion, two hundred twenty billion, one hundred million, two hundred nine", and thus it is an aban number.