313101421 has 2 divisors, whose sum is σ = 313101422. Its totient is φ = 313101420.

The previous prime is 313101419. The next prime is 313101449. The reversal of 313101421 is 124101313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260015625 + 53085796 = 16125^2 + 7286^2 .

It is a cyclic number.

It is not a de Polignac number, because 313101421 - 2¹ = 313101419 is a prime.

Together with 313101419, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 313101395 and 313101404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313141421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156550710 + 156550711.

It is an arithmetic number, because the mean of its divisors is an integer number (156550711).

Almost surely, 2^313101421 is an apocalyptic number.

It is an amenable number.

313101421 is a deficient number, since it is larger than the sum of its proper divisors (1).

313101421 is an equidigital number, since it uses as much as digits as its factorization.

313101421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 313101421 is about 17694.6721077278. The cubic root of 313101421 is about 679.0394605744.

Adding to 313101421 its reverse (124101313), we get a palindrome (437202734).

The spelling of 313101421 in words is "three hundred thirteen million, one hundred one thousand, four hundred twenty-one".