1211024304431 has 16 divisors (see below), whose sum is σ = 1248430596864. Its totient is φ = 1174040892864.

The previous prime is 1211024304383. The next prime is 1211024304499. The reversal of 1211024304431 is 1344034201121.

It is a cyclic number.

It is not a de Polignac number, because 1211024304431 - 2³⁴ = 1193844435247 is a prime.

It is a super-2 number, since 2×1211024304431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211024304431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211024304031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50432630 + ... + 50456636.

It is an arithmetic number, because the mean of its divisors is an integer number (78026912304).

Almost surely, 2^{1211024304431} is an apocalyptic number.

1211024304431 is a deficient number, since it is larger than the sum of its proper divisors (37406292433).

1211024304431 is a wasteful number, since it uses less digits than its factorization.

1211024304431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32750.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 1211024304431 its reverse (1344034201121), we get a palindrome (2555058505552).

The spelling of 1211024304431 in words is "one trillion, two hundred eleven billion, twenty-four million, three hundred four thousand, four hundred thirty-one".