1220200001001 has 12 divisors (see below), whose sum is σ = 1762560524400. Its totient is φ = 813443861880.

The previous prime is 1220200000951. The next prime is 1220200001021. The reversal of 1220200001001 is 1001000020221.

It is not a de Polignac number, because 1220200001001 - 2⁶ = 1220200000937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1220200001021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1558351 + ... + 2206548.

It is an arithmetic number, because the mean of its divisors is an integer number (146880043700).

Almost surely, 2^{1220200001001} is an apocalyptic number.

It is an amenable number.

1220200001001 is a deficient number, since it is larger than the sum of its proper divisors (542360523399).

1220200001001 is a wasteful number, since it uses less digits than its factorization.

1220200001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3800916 (or 3800913 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1220200001001 its reverse (1001000020221), we get a palindrome (2221200021222).

The spelling of 1220200001001 in words is "one trillion, two hundred twenty billion, two hundred million, one thousand, one".