1211111120003 has 4 divisors (see below), whose sum is σ = 1225702820328. Its totient is φ = 1196519419680.

The previous prime is 1211111119993. The next prime is 1211111120017. The reversal of 1211111120003 is 3000211111121.

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-1211111120003 is a prime.

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 1211111120003.

It is not an unprimeable number, because it can be changed into a prime (1211111120033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7295850038 + ... + 7295850203.

It is an arithmetic number, because the mean of its divisors is an integer number (306425705082).

Almost surely, 2^{1211111120003} is an apocalyptic number.

1211111120003 is a deficient number, since it is larger than the sum of its proper divisors (14591700325).

1211111120003 is an equidigital number, since it uses as much as digits as its factorization.

1211111120003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14591700324.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 1211111120003 its reverse (3000211111121), we get a palindrome (4211322231124).

The spelling of 1211111120003 in words is "one trillion, two hundred eleven billion, one hundred eleven million, one hundred twenty thousand, three".