1021300213 has 4 divisors (see below), whose sum is σ = 1023659308. Its totient is φ = 1018941120.

The previous prime is 1021300199. The next prime is 1021300249. The reversal of 1021300213 is 3120031201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 480179569 + 541120644 = 21913^2 + 23262^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021300213 - 2¹³ = 1021292021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021300193 and 1021300202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021300913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1178898 + ... + 1179763.

It is an arithmetic number, because the mean of its divisors is an integer number (255914827).

Almost surely, 2^1021300213 is an apocalyptic number.

It is an amenable number.

1021300213 is a deficient number, since it is larger than the sum of its proper divisors (2359095).

1021300213 is an equidigital number, since it uses as much as digits as its factorization.

1021300213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2359094.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1021300213 is about 31957.7879866551. The cubic root of 1021300213 is about 1007.0502481873.

Adding to 1021300213 its reverse (3120031201), we get a palindrome (4141331414).

The spelling of 1021300213 in words is "one billion, twenty-one million, three hundred thousand, two hundred thirteen".