1212110021203 has 4 divisors (see below), whose sum is σ = 1212113246200. Its totient is φ = 1212106796208.

The previous prime is 1212110021197. The next prime is 1212110021251. The reversal of 1212110021203 is 3021200112121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212110021203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212110021503) 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 3 ways as a sum of consecutive naturals, for example, 960978 + ... + 1829671.

It is an arithmetic number, because the mean of its divisors is an integer number (303028311550).

Almost surely, 2^{1212110021203} is an apocalyptic number.

1212110021203 is a deficient number, since it is larger than the sum of its proper divisors (3224997).

1212110021203 is an equidigital number, since it uses as much as digits as its factorization.

1212110021203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3224996.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1212110021203 its reverse (3021200112121), we get a palindrome (4233310133324).

The spelling of 1212110021203 in words is "one trillion, two hundred twelve billion, one hundred ten million, twenty-one thousand, two hundred three".