1220001001201 has 12 divisors (see below), whose sum is σ = 1252378597008. Its totient is φ = 1187817662304.

The previous prime is 1220001001099. The next prime is 1220001001211. The reversal of 1220001001201 is 1021001000221.

It is not a de Polignac number, because 1220001001201 - 2¹⁷ = 1220000870129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220001001211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4067866 + ... + 4357468.

It is an arithmetic number, because the mean of its divisors is an integer number (104364883084).

Almost surely, 2^{1220001001201} is an apocalyptic number.

It is an amenable number.

1220001001201 is a deficient number, since it is larger than the sum of its proper divisors (32377595807).

1220001001201 is an frugal number, since it uses more digits than its factorization.

1220001001201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290272 (or 289959 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1220001001201 its reverse (1021001000221), we get a palindrome (2241002001422).

The spelling of 1220001001201 in words is "one trillion, two hundred twenty billion, one million, one thousand, two hundred one".