1201212121203 has 12 divisors (see below), whose sum is σ = 1735097135200. Its totient is φ = 800802099216.

The previous prime is 1201212121199. The next prime is 1201212121237. The reversal of 1201212121203 is 3021212121021.

It is not a de Polignac number, because 1201212121203 - 2² = 1201212121199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201212121003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1015350 + ... + 1852932.

Almost surely, 2^{1201212121203} is an apocalyptic number.

1201212121203 is a deficient number, since it is larger than the sum of its proper divisors (533885013997).

1201212121203 is a wasteful number, since it uses less digits than its factorization.

1201212121203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996938 (or 996935 counting only the distinct ones).

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

Adding to 1201212121203 its reverse (3021212121021), we get a palindrome (4222424242224).

The spelling of 1201212121203 in words is "one trillion, two hundred one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred three".