1211200220203 has 16 divisors (see below), whose sum is σ = 1231671346560. Its totient is φ = 1190867932800.

The previous prime is 1211200220189. The next prime is 1211200220207. The reversal of 1211200220203 is 3020220021121.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211200220203 is a prime.

It is a super-2 number, since 2×1211200220203² (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 (1211200220207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18492573 + ... + 18557953.

It is an arithmetic number, because the mean of its divisors is an integer number (76979459160).

Almost surely, 2^{1211200220203} is an apocalyptic number.

1211200220203 is a deficient number, since it is larger than the sum of its proper divisors (20471126357).

1211200220203 is an equidigital number, since it uses as much as digits as its factorization.

1211200220203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66438.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1211200220203 its reverse (3020220021121), we get a palindrome (4231420241324).

The spelling of 1211200220203 in words is "one trillion, two hundred eleven billion, two hundred million, two hundred twenty thousand, two hundred three".