1211000122003 has 4 divisors (see below), whose sum is σ = 1384000139440. Its totient is φ = 1038000104568.

The previous prime is 1211000121979. The next prime is 1211000122019. The reversal of 1211000122003 is 3002210001121.

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

It is not a de Polignac number, because 1211000122003 - 2¹⁷ = 1210999990931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211000120003) 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 3 ways as a sum of consecutive naturals, for example, 86500008708 + ... + 86500008721.

It is an arithmetic number, because the mean of its divisors is an integer number (346000034860).

Almost surely, 2^{1211000122003} is an apocalyptic number.

1211000122003 is a deficient number, since it is larger than the sum of its proper divisors (173000017437).

1211000122003 is an equidigital number, since it uses as much as digits as its factorization.

1211000122003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173000017436.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1211000122003 its reverse (3002210001121), we get a palindrome (4213210123124).

The spelling of 1211000122003 in words is "one trillion, two hundred eleven billion, one hundred twenty-two thousand, three".