1220211022109 has 4 divisors (see below), whose sum is σ = 1227517675104. Its totient is φ = 1212904369116.

The previous prime is 1220211022087. The next prime is 1220211022169. The reversal of 1220211022109 is 9012201120221.

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 a de Polignac number, because none of the positive numbers 2^k-1220211022109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220211022169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3653326247 + ... + 3653326580.

It is an arithmetic number, because the mean of its divisors is an integer number (306879418776).

Almost surely, 2^{1220211022109} is an apocalyptic number.

It is an amenable number.

1220211022109 is a deficient number, since it is larger than the sum of its proper divisors (7306652995).

1220211022109 is an equidigital number, since it uses as much as digits as its factorization.

1220211022109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7306652994.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 1220211022109 in words is "one trillion, two hundred twenty billion, two hundred eleven million, twenty-two thousand, one hundred nine".