1211200211444 has 6 divisors (see below), whose sum is σ = 2119600370034. Its totient is φ = 605600105720.

The previous prime is 1211200211443. The next prime is 1211200211447. The reversal of 1211200211444 is 4441120021121.

It can be written as a sum of positive squares in only one way, i.e., 1189997356900 + 21202854544 = 1090870^2 + 145612^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211200211443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151400026427 + ... + 151400026434.

It is an arithmetic number, because the mean of its divisors is an integer number (353266728339).

Almost surely, 2^{1211200211444} is an apocalyptic number.

It is an amenable number.

1211200211444 is a deficient number, since it is larger than the sum of its proper divisors (908400158590).

1211200211444 is a wasteful number, since it uses less digits than its factorization.

1211200211444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302800052865 (or 302800052863 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 1211200211444 its reverse (4441120021121), we get a palindrome (5652320232565).

The spelling of 1211200211444 in words is "one trillion, two hundred eleven billion, two hundred million, two hundred eleven thousand, four hundred forty-four".