3121331221303 has 4 divisors (see below), whose sum is σ = 3222019325248. Its totient is φ = 3020643117360.

The previous prime is 3121331221297. The next prime is 3121331221339. The reversal of 3121331221303 is 3031221331213.

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

It is a de Polignac number, because none of the positive numbers 2^k-3121331221303 is a prime.

It is a super-2 number, since 2×3121331221303² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121331221373) 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, 50344051926 + ... + 50344051987.

It is an arithmetic number, because the mean of its divisors is an integer number (805504831312).

Almost surely, 2^{3121331221303} is an apocalyptic number.

3121331221303 is a deficient number, since it is larger than the sum of its proper divisors (100688103945).

3121331221303 is a wasteful number, since it uses less digits than its factorization.

3121331221303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100688103944.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 3121331221303 its reverse (3031221331213), we get a palindrome (6152552552516).

The spelling of 3121331221303 in words is "three trillion, one hundred twenty-one billion, three hundred thirty-one million, two hundred twenty-one thousand, three hundred three".