12121031331203 has 4 divisors (see below), whose sum is σ = 12122939260008. Its totient is φ = 12119123402400.

The previous prime is 12121031331191. The next prime is 12121031331223. The reversal of 12121031331203 is 30213313012121.

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 12121031331203 - 2⁴² = 7722984820099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121031331223) 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, 953954873 + ... + 953967578.

It is an arithmetic number, because the mean of its divisors is an integer number (3030734815002).

Almost surely, 2^{12121031331203} is an apocalyptic number.

12121031331203 is a deficient number, since it is larger than the sum of its proper divisors (1907928805).

12121031331203 is an equidigital number, since it uses as much as digits as its factorization.

12121031331203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907928804.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 12121031331203 its reverse (30213313012121), we get a palindrome (42334344343324).

The spelling of 12121031331203 in words is "twelve trillion, one hundred twenty-one billion, thirty-one million, three hundred thirty-one thousand, two hundred three".