1212231120203 has 4 divisors (see below), whose sum is σ = 1212368119800. Its totient is φ = 1212094120608.

The previous prime is 1212231120197. The next prime is 1212231120209. The reversal of 1212231120203 is 3020211322121.

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

It is an interprime number because it is at equal distance from previous prime (1212231120197) and next prime (1212231120209).

It is a cyclic number.

It is not a de Polignac number, because 1212231120203 - 2⁴ = 1212231120187 is a prime.

It is a super-2 number, since 2×1212231120203² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212231120209) 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, 68486525 + ... + 68504222.

It is an arithmetic number, because the mean of its divisors is an integer number (303092029950).

Almost surely, 2^{1212231120203} is an apocalyptic number.

1212231120203 is a deficient number, since it is larger than the sum of its proper divisors (136999597).

1212231120203 is an equidigital number, since it uses as much as digits as its factorization.

1212231120203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136999596.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1212231120203 its reverse (3020211322121), we get a palindrome (4232442442324).

The spelling of 1212231120203 in words is "one trillion, two hundred twelve billion, two hundred thirty-one million, one hundred twenty thousand, two hundred three".