1010021213 has 2 divisors, whose sum is σ = 1010021214. Its totient is φ = 1010021212.

The previous prime is 1010021203. The next prime is 1010021267. The reversal of 1010021213 is 3121200101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 932264089 + 77757124 = 30533^2 + 8818^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010021213 - 2⁴ = 1010021197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1010021194 and 1010021203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1010021203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505010606 + 505010607.

It is an arithmetic number, because the mean of its divisors is an integer number (505010607).

Almost surely, 2^1010021213 is an apocalyptic number.

It is an amenable number.

1010021213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010021213 is an equidigital number, since it uses as much as digits as its factorization.

1010021213 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 11.

The square root of 1010021213 is about 31780.8309048080. The cubic root of 1010021213 is about 1003.3293077423.

Adding to 1010021213 its reverse (3121200101), we get a palindrome (4131221314).

It can be divided in two parts, 10100 and 21213, that added together give a palindrome (31313).

The spelling of 1010021213 in words is "one billion, ten million, twenty-one thousand, two hundred thirteen".