1200001010203 has 4 divisors (see below), whose sum is σ = 1200119797008. Its totient is φ = 1199882223400.

The previous prime is 1200001010183. The next prime is 1200001010239. The reversal of 1200001010203 is 3020101000021.

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-1200001010203 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 1200001010203.

It is not an unprimeable number, because it can be changed into a prime (1200001310203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59378248 + ... + 59398453.

It is an arithmetic number, because the mean of its divisors is an integer number (300029949252).

Almost surely, 2^{1200001010203} is an apocalyptic number.

1200001010203 is a deficient number, since it is larger than the sum of its proper divisors (118786805).

1200001010203 is a wasteful number, since it uses less digits than its factorization.

1200001010203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118786804.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 1200001010203 its reverse (3020101000021), we get a palindrome (4220102010224).

The spelling of 1200001010203 in words is "one trillion, two hundred billion, one million, ten thousand, two hundred three".