1212202121003 has 4 divisors (see below), whose sum is σ = 1212884284920. Its totient is φ = 1211519957088.

The previous prime is 1212202120967. The next prime is 1212202121017. The reversal of 1212202121003 is 3001212022121.

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-1212202121003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212202121033) 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, 341079293 + ... + 341082846.

It is an arithmetic number, because the mean of its divisors is an integer number (303221071230).

Almost surely, 2^{1212202121003} is an apocalyptic number.

1212202121003 is a deficient number, since it is larger than the sum of its proper divisors (682163917).

1212202121003 is an equidigital number, since it uses as much as digits as its factorization.

1212202121003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682163916.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1212202121003 its reverse (3001212022121), we get a palindrome (4213414143124).

The spelling of 1212202121003 in words is "one trillion, two hundred twelve billion, two hundred two million, one hundred twenty-one thousand, three".