1211242234431 has 8 divisors (see below), whose sum is σ = 1617549061504. Its totient is φ = 806215115160.

The previous prime is 1211242234421. The next prime is 1211242234469. The reversal of 1211242234431 is 1344322421121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211242234431 - 2⁵ = 1211242234399 is a prime.

It is a super-2 number, since 2×1211242234431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211242234421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319924741 + ... + 319928526.

It is an arithmetic number, because the mean of its divisors is an integer number (202193632688).

Almost surely, 2^{1211242234431} is an apocalyptic number.

1211242234431 is a deficient number, since it is larger than the sum of its proper divisors (406306827073).

1211242234431 is an equidigital number, since it uses as much as digits as its factorization.

1211242234431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639853901.

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

Adding to 1211242234431 its reverse (1344322421121), we get a palindrome (2555564655552).

The spelling of 1211242234431 in words is "one trillion, two hundred eleven billion, two hundred forty-two million, two hundred thirty-four thousand, four hundred thirty-one".