1231211102203 has 4 divisors (see below), whose sum is σ = 1231669998328. Its totient is φ = 1230752206080.

The previous prime is 1231211102161. The next prime is 1231211102257. The reversal of 1231211102203 is 3022011121321.

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 1231211102203 - 2³³ = 1222621167611 is a prime.

It is a super-2 number, since 2×1231211102203² (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 (1231211102263) 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, 229444038 + ... + 229449403.

It is an arithmetic number, because the mean of its divisors is an integer number (307917499582).

Almost surely, 2^{1231211102203} is an apocalyptic number.

1231211102203 is a deficient number, since it is larger than the sum of its proper divisors (458896125).

1231211102203 is an equidigital number, since it uses as much as digits as its factorization.

1231211102203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458896124.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1231211102203 its reverse (3022011121321), we get a palindrome (4253222223524).

The spelling of 1231211102203 in words is "one trillion, two hundred thirty-one billion, two hundred eleven million, one hundred two thousand, two hundred three".