1220000200101 has 24 divisors (see below), whose sum is σ = 1872819088920. Its totient is φ = 762644606976.

The previous prime is 1220000200099. The next prime is 1220000200189. The reversal of 1220000200101 is 1010020000221.

It can be written as a sum of positive squares in 4 ways, for example, as 143490197601 + 1076510002500 = 378801^2 + 1037550^2 .

It is not a de Polignac number, because 1220000200101 - 2¹ = 1220000200099 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220000200201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14780140 + ... + 14862453.

It is an arithmetic number, because the mean of its divisors is an integer number (78034128705).

Almost surely, 2^{1220000200101} is an apocalyptic number.

It is an amenable number.

1220000200101 is a deficient number, since it is larger than the sum of its proper divisors (652818888819).

1220000200101 is a wasteful number, since it uses less digits than its factorization.

1220000200101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29642885 (or 29642882 counting only the distinct ones).

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

Adding to 1220000200101 its reverse (1010020000221), we get a palindrome (2230020200322).

The spelling of 1220000200101 in words is "one trillion, two hundred twenty billion, two hundred thousand, one hundred one".