3121420440313 has 12 divisors (see below), whose sum is σ = 3694591076800. Its totient is φ = 2583244497456.

The previous prime is 3121420440293. The next prime is 3121420440407. The reversal of 3121420440313 is 3130440241213.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-3121420440313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121420440013) 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, 265105413 + ... + 265117186.

Almost surely, 2^{3121420440313} is an apocalyptic number.

It is an amenable number.

3121420440313 is a deficient number, since it is larger than the sum of its proper divisors (573170636487).

3121420440313 is an equidigital number, since it uses as much as digits as its factorization.

3121420440313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530222664 (or 530222635 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 3121420440313 its reverse (3130440241213), we get a palindrome (6251860681526).

The spelling of 3121420440313 in words is "three trillion, one hundred twenty-one billion, four hundred twenty million, four hundred forty thousand, three hundred thirteen".