1421203313 has 2 divisors, whose sum is σ = 1421203314. Its totient is φ = 1421203312.

The previous prime is 1421203309. The next prime is 1421203351. The reversal of 1421203313 is 3133021241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1322558689 + 98644624 = 36367^2 + 9932^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421203313 - 2² = 1421203309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1421203013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710601656 + 710601657.

It is an arithmetic number, because the mean of its divisors is an integer number (710601657).

Almost surely, 2^1421203313 is an apocalyptic number.

It is an amenable number.

1421203313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421203313 is an equidigital number, since it uses as much as digits as its factorization.

1421203313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1421203313 is about 37698.8502875088. The cubic root of 1421203313 is about 1124.3082662475.

Adding to 1421203313 its reverse (3133021241), we get a palindrome (4554224554).

The spelling of 1421203313 in words is "one billion, four hundred twenty-one million, two hundred three thousand, three hundred thirteen".