1042021213 has 2 divisors, whose sum is σ = 1042021214. Its totient is φ = 1042021212.

The previous prime is 1042021153. The next prime is 1042021223. The reversal of 1042021213 is 3121202401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 777405924 + 264615289 = 27882^2 + 16267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1042021213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042021223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521010606 + 521010607.

It is an arithmetic number, because the mean of its divisors is an integer number (521010607).

Almost surely, 2^1042021213 is an apocalyptic number.

It is an amenable number.

1042021213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042021213 is an equidigital number, since it uses as much as digits as its factorization.

1042021213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1042021213 is about 32280.3533592803. The cubic root of 1042021213 is about 1013.8153287452.

Adding to 1042021213 its reverse (3121202401), we get a palindrome (4163223614).

The spelling of 1042021213 in words is "one billion, forty-two million, twenty-one thousand, two hundred thirteen".