1111121212203 has 32 divisors (see below), whose sum is σ = 1654918816320. Its totient is φ = 736783568640.

The previous prime is 1111121212189. The next prime is 1111121212237. The reversal of 1111121212203 is 3022121211111.

It is a happy number.

It is not a de Polignac number, because 1111121212203 - 2²⁶ = 1111054103339 is a prime.

It is a super-2 number, since 2×1111121212203² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1111121212273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20594823 + ... + 20648703.

It is an arithmetic number, because the mean of its divisors is an integer number (51716213010).

Almost surely, 2^{1111121212203} is an apocalyptic number.

1111121212203 is a deficient number, since it is larger than the sum of its proper divisors (543797604117).

1111121212203 is a wasteful number, since it uses less digits than its factorization.

1111121212203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57964 (or 57958 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1111121212203 its reverse (3022121211111), we get a palindrome (4133242423314).

The spelling of 1111121212203 in words is "one trillion, one hundred eleven billion, one hundred twenty-one million, two hundred twelve thousand, two hundred three".