1211204212203 has 16 divisors (see below), whose sum is σ = 1641034286336. Its totient is φ = 794451097440.

The previous prime is 1211204212201. The next prime is 1211204212243. The reversal of 1211204212203 is 3022124021121.

It is a happy number.

It is not a de Polignac number, because 1211204212203 - 2¹ = 1211204212201 is a prime.

It is a super-2 number, since 2×1211204212203² (a number of 25 digits) contains 22 as substring.

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 1211204212203.

It is not an unprimeable number, because it can be changed into a prime (1211204212201) 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 15 ways as a sum of consecutive naturals, for example, 3495508 + ... + 3826353.

It is an arithmetic number, because the mean of its divisors is an integer number (102564642896).

Almost surely, 2^{1211204212203} is an apocalyptic number.

1211204212203 is a deficient number, since it is larger than the sum of its proper divisors (429830074133).

1211204212203 is an equidigital number, since it uses as much as digits as its factorization.

1211204212203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7322754.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1211204212203 its reverse (3022124021121), we get a palindrome (4233328233324).

The spelling of 1211204212203 in words is "one trillion, two hundred eleven billion, two hundred four million, two hundred twelve thousand, two hundred three".