1211144332242 has 128 divisors (see below), whose sum is σ = 2699684951040. Its totient is φ = 359929440000.

The previous prime is 1211144332207. The next prime is 1211144332247. The reversal of 1211144332242 is 2422334411121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1211144332247) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60879117 + ... + 60899007.

It is an arithmetic number, because the mean of its divisors is an integer number (21091288680).

Almost surely, 2^{1211144332242} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211144332242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1349842475520).

1211144332242 is an abundant number, since it is smaller than the sum of its proper divisors (1488540618798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211144332242 is a wasteful number, since it uses less digits than its factorization.

1211144332242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20200.

The product of its digits is 9216, while the sum is 30.

Adding to 1211144332242 its reverse (2422334411121), we get a palindrome (3633478743363).

The spelling of 1211144332242 in words is "one trillion, two hundred eleven billion, one hundred forty-four million, three hundred thirty-two thousand, two hundred forty-two".