1220101110001 has 8 divisors (see below), whose sum is σ = 1282864933800. Its totient is φ = 1158716711040.

The previous prime is 1220101109989. The next prime is 1220101110047. The reversal of 1220101110001 is 1000111010221.

It can be written as a sum of positive squares in 4 ways, for example, as 42444240400 + 1177656869601 = 206020^2 + 1085199^2 .

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 1220101110001 - 2¹⁵ = 1220101077233 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 1220101110001.

It is not an unprimeable number, because it can be changed into a prime (1220101410001) 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, 344854396 + ... + 344857933.

It is an arithmetic number, because the mean of its divisors is an integer number (160358116725).

Almost surely, 2^{1220101110001} is an apocalyptic number.

It is an amenable number.

1220101110001 is a deficient number, since it is larger than the sum of its proper divisors (62763823799).

1220101110001 is an equidigital number, since it uses as much as digits as its factorization.

1220101110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689712419.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1220101110001 its reverse (1000111010221), we get a palindrome (2220212120222).

The spelling of 1220101110001 in words is "one trillion, two hundred twenty billion, one hundred one million, one hundred ten thousand, one".