1021213247 has 2 divisors, whose sum is σ = 1021213248. Its totient is φ = 1021213246.

The previous prime is 1021213111. The next prime is 1021213289. The reversal of 1021213247 is 7423121201.

It is a strong prime.

It is an emirp because it is prime and its reverse (7423121201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021213247 - 2⁸ = 1021212991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021213747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510606623 + 510606624.

It is an arithmetic number, because the mean of its divisors is an integer number (510606624).

Almost surely, 2^1021213247 is an apocalyptic number.

1021213247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021213247 is an equidigital number, since it uses as much as digits as its factorization.

1021213247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1021213247 is about 31956.4273190856. The cubic root of 1021213247 is about 1007.0216631814.

Adding to 1021213247 its reverse (7423121201), we get a palindrome (8444334448).

The spelling of 1021213247 in words is "one billion, twenty-one million, two hundred thirteen thousand, two hundred forty-seven".