1021203397 has 2 divisors, whose sum is σ = 1021203398. Its totient is φ = 1021203396.

The previous prime is 1021203383. The next prime is 1021203433. The reversal of 1021203397 is 7933021201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 655667236 + 365536161 = 25606^2 + 19119^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021203397 - 2¹⁹ = 1020679109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021203307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510601698 + 510601699.

It is an arithmetic number, because the mean of its divisors is an integer number (510601699).

Almost surely, 2^1021203397 is an apocalyptic number.

It is an amenable number.

1021203397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021203397 is an equidigital number, since it uses as much as digits as its factorization.

1021203397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 1021203397 is about 31956.2732026123. The cubic root of 1021203397 is about 1007.0184254654.

Adding to 1021203397 its reverse (7933021201), we get a palindrome (8954224598).

The spelling of 1021203397 in words is "one billion, twenty-one million, two hundred three thousand, three hundred ninety-seven".