1220220222101 has 4 divisors (see below), whose sum is σ = 1220222594304. Its totient is φ = 1220217849900.

The previous prime is 1220220222083. The next prime is 1220220222121. The reversal of 1220220222101 is 1012220220221.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220220222101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220220222101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220220222121) 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, 54935 + ... + 1563156.

It is an arithmetic number, because the mean of its divisors is an integer number (305055648576).

Almost surely, 2^{1220220222101} is an apocalyptic number.

It is an amenable number.

1220220222101 is a deficient number, since it is larger than the sum of its proper divisors (2372203).

1220220222101 is an equidigital number, since it uses as much as digits as its factorization.

1220220222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372202.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1220220222101 its reverse (1012220220221), we get a palindrome (2232440442322).

The spelling of 1220220222101 in words is "one trillion, two hundred twenty billion, two hundred twenty million, two hundred twenty-two thousand, one hundred one".