1211203020441 has 16 divisors (see below), whose sum is σ = 1637726491008. Its totient is φ = 796074720000.

The previous prime is 1211203020431. The next prime is 1211203020491. The reversal of 1211203020441 is 1440203021121.

It is not a de Polignac number, because 1211203020441 - 2⁵ = 1211203020409 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1211203020421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14976385 + ... + 15057041.

It is an arithmetic number, because the mean of its divisors is an integer number (102357905688).

Almost surely, 2^{1211203020441} is an apocalyptic number.

It is an amenable number.

1211203020441 is a deficient number, since it is larger than the sum of its proper divisors (426523470567).

1211203020441 is an equidigital number, since it uses as much as digits as its factorization.

1211203020441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151232.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1211203020441 its reverse (1440203021121), we get a palindrome (2651406041562).

The spelling of 1211203020441 in words is "one trillion, two hundred eleven billion, two hundred three million, twenty thousand, four hundred forty-one".