1211321120003 has 4 divisors (see below), whose sum is σ = 1211367934920. Its totient is φ = 1211274305088.

The previous prime is 1211321119979. The next prime is 1211321120033. The reversal of 1211321120003 is 3000211231121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211321120003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211321120033) 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 3 ways as a sum of consecutive naturals, for example, 23368625 + ... + 23420402.

It is an arithmetic number, because the mean of its divisors is an integer number (302841983730).

Almost surely, 2^{1211321120003} is an apocalyptic number.

1211321120003 is a deficient number, since it is larger than the sum of its proper divisors (46814917).

1211321120003 is an equidigital number, since it uses as much as digits as its factorization.

1211321120003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46814916.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1211321120003 its reverse (3000211231121), we get a palindrome (4211532351124).

The spelling of 1211321120003 in words is "one trillion, two hundred eleven billion, three hundred twenty-one million, one hundred twenty thousand, three".