1211112220203 has 24 divisors (see below), whose sum is σ = 1759325677200. Its totient is φ = 802820692224.

The previous prime is 1211112220187. The next prime is 1211112220211. The reversal of 1211112220203 is 3020222111121.

It is not a de Polignac number, because 1211112220203 - 2⁴ = 1211112220187 is a prime.

It is a super-2 number, since 2×1211112220203² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211112225203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20425263 + ... + 20484471.

It is an arithmetic number, because the mean of its divisors is an integer number (73305236550).

Almost surely, 2^{1211112220203} is an apocalyptic number.

1211112220203 is a deficient number, since it is larger than the sum of its proper divisors (548213456997).

1211112220203 is a wasteful number, since it uses less digits than its factorization.

1211112220203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72091 (or 72088 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1211112220203 its reverse (3020222111121), we get a palindrome (4231334331324).

The spelling of 1211112220203 in words is "one trillion, two hundred eleven billion, one hundred twelve million, two hundred twenty thousand, two hundred three".