1211112120103 has 4 divisors (see below), whose sum is σ = 1213539199000. Its totient is φ = 1208685041208.

The previous prime is 1211112120079. The next prime is 1211112120121. The reversal of 1211112120103 is 3010212111121.

It is a happy number.

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-1211112120103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211112120503) 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, 1213538700 + ... + 1213539697.

It is an arithmetic number, because the mean of its divisors is an integer number (303384799750).

Almost surely, 2^{1211112120103} is an apocalyptic number.

1211112120103 is a deficient number, since it is larger than the sum of its proper divisors (2427078897).

1211112120103 is an equidigital number, since it uses as much as digits as its factorization.

1211112120103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427078896.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1211112120103 its reverse (3010212111121), we get a palindrome (4221324231224).

The spelling of 1211112120103 in words is "one trillion, two hundred eleven billion, one hundred twelve million, one hundred twenty thousand, one hundred three".