1211000010203 has 4 divisors (see below), whose sum is σ = 1219127527200. Its totient is φ = 1202872493208.

The previous prime is 1211000010193. The next prime is 1211000010251. The reversal of 1211000010203 is 3020100001121.

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

It is a cyclic number.

It is not a de Polignac number, because 1211000010203 - 2⁴⁰ = 111488382427 is a prime.

It is a super-2 number, since 2×1211000010203² (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 (1211000030203) 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, 4063758275 + ... + 4063758572.

It is an arithmetic number, because the mean of its divisors is an integer number (304781881800).

Almost surely, 2^{1211000010203} is an apocalyptic number.

1211000010203 is a deficient number, since it is larger than the sum of its proper divisors (8127516997).

1211000010203 is an equidigital number, since it uses as much as digits as its factorization.

1211000010203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8127516996.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 1211000010203 its reverse (3020100001121), we get a palindrome (4231100011324).

The spelling of 1211000010203 in words is "one trillion, two hundred eleven billion, ten thousand, two hundred three".