1211203011201 has 32 divisors (see below), whose sum is σ = 1785055345920. Its totient is φ = 726611871744.

The previous prime is 1211203011163. The next prime is 1211203011229. The reversal of 1211203011201 is 1021103021121.

It is not a de Polignac number, because 1211203011201 - 2³⁵ = 1176843272833 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1211203010201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2484861 + ... + 2932053.

It is an arithmetic number, because the mean of its divisors is an integer number (55782979560).

Almost surely, 2^{1211203011201} is an apocalyptic number.

It is an amenable number.

1211203011201 is a deficient number, since it is larger than the sum of its proper divisors (573852334719).

1211203011201 is a wasteful number, since it uses less digits than its factorization.

1211203011201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449545.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1211203011201 its reverse (1021103021121), we get a palindrome (2232306032322).

The spelling of 1211203011201 in words is "one trillion, two hundred eleven billion, two hundred three million, eleven thousand, two hundred one".