1212100111303 has 4 divisors (see below), whose sum is σ = 1213242525288. Its totient is φ = 1210957697320.

The previous prime is 1212100111289. The next prime is 1212100111349. The reversal of 1212100111303 is 3031110012121.

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-1212100111303 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 (1212100111603) 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, 571205401 + ... + 571207522.

It is an arithmetic number, because the mean of its divisors is an integer number (303310631322).

Almost surely, 2^{1212100111303} is an apocalyptic number.

1212100111303 is a deficient number, since it is larger than the sum of its proper divisors (1142413985).

1212100111303 is a wasteful number, since it uses less digits than its factorization.

1212100111303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142413984.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1212100111303 its reverse (3031110012121), we get a palindrome (4243210123424).

The spelling of 1212100111303 in words is "one trillion, two hundred twelve billion, one hundred million, one hundred eleven thousand, three hundred three".