1211322012455 has 8 divisors (see below), whose sum is σ = 1453592968800. Its totient is φ = 969053240736.

The previous prime is 1211322012403. The next prime is 1211322012457. The reversal of 1211322012455 is 5542102231121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211322012455 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211322012457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1155926 + ... + 1938764.

It is an arithmetic number, because the mean of its divisors is an integer number (181699121100).

Almost surely, 2^{1211322012455} is an apocalyptic number.

1211322012455 is a deficient number, since it is larger than the sum of its proper divisors (242270956345).

1211322012455 is an equidigital number, since it uses as much as digits as its factorization.

1211322012455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092313.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 1211322012455 its reverse (5542102231121), we get a palindrome (6753424243576).

The spelling of 1211322012455 in words is "one trillion, two hundred eleven billion, three hundred twenty-two million, twelve thousand, four hundred fifty-five".