1001020213 has 2 divisors, whose sum is σ = 1001020214. Its totient is φ = 1001020212.

The previous prime is 1001020171. The next prime is 1001020243. The reversal of 1001020213 is 3120201001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 963357444 + 37662769 = 31038^2 + 6137^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001020213 - 2²¹ = 998923061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001020213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001020243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500510106 + 500510107.

It is an arithmetic number, because the mean of its divisors is an integer number (500510107).

Almost surely, 2^1001020213 is an apocalyptic number.

It is an amenable number.

1001020213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001020213 is an equidigital number, since it uses as much as digits as its factorization.

1001020213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1001020213 is about 31638.9034734139. The cubic root of 1001020213 is about 1000.3399554172.

Adding to 1001020213 its reverse (3120201001), we get a palindrome (4121221214).

The spelling of 1001020213 in words is "one billion, one million, twenty thousand, two hundred thirteen".