1314421021 has 2 divisors, whose sum is σ = 1314421022. Its totient is φ = 1314421020.

The previous prime is 1314421019. The next prime is 1314421037. The reversal of 1314421021 is 1201244131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1267004025 + 47416996 = 35595^2 + 6886^2 .

It is an emirp because it is prime and its reverse (1201244131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1314421021 - 2¹ = 1314421019 is a prime.

Together with 1314421019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1314421021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1314421051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657210510 + 657210511.

It is an arithmetic number, because the mean of its divisors is an integer number (657210511).

Almost surely, 2^1314421021 is an apocalyptic number.

It is an amenable number.

1314421021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1314421021 is an equidigital number, since it uses as much as digits as its factorization.

1314421021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1314421021 is about 36254.9447799883. The cubic root of 1314421021 is about 1095.4136927167.

Adding to 1314421021 its reverse (1201244131), we get a palindrome (2515665152).

The spelling of 1314421021 in words is "one billion, three hundred fourteen million, four hundred twenty-one thousand, twenty-one".