1211144332243 has 4 divisors (see below), whose sum is σ = 1212316786648. Its totient is φ = 1209971877840.

The previous prime is 1211144332207. The next prime is 1211144332247. The reversal of 1211144332243 is 3422334411121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1211144332243 - 2¹⁷ = 1211144201171 is a prime.

It is a super-2 number, since 2×1211144332243² (a number of 25 digits) contains 22 as substring.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 586225653 + ... + 586227718.

It is an arithmetic number, because the mean of its divisors is an integer number (303079196662).

Almost surely, 2^{1211144332243} is an apocalyptic number.

1211144332243 is a deficient number, since it is larger than the sum of its proper divisors (1172454405).

1211144332243 is a wasteful number, since it uses less digits than its factorization.

1211144332243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172454404.

The product of its digits is 13824, while the sum is 31.

Adding to 1211144332243 its reverse (3422334411121), we get a palindrome (4633478743364).

The spelling of 1211144332243 in words is "one trillion, two hundred eleven billion, one hundred forty-four million, three hundred thirty-two thousand, two hundred forty-three".