1021242243 has 16 divisors (see below), whose sum is σ = 1575879680. Its totient is φ = 576179136.

The previous prime is 1021242239. The next prime is 1021242247. The reversal of 1021242243 is 3422421201.

It is an interprime number because it is at equal distance from previous prime (1021242239) and next prime (1021242247).

It is not a de Polignac number, because 1021242243 - 2² = 1021242239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021242247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306130 + ... + 309447.

It is an arithmetic number, because the mean of its divisors is an integer number (98492480).

Almost surely, 2^1021242243 is an apocalyptic number.

1021242243 is a deficient number, since it is larger than the sum of its proper divisors (554637437).

1021242243 is an equidigital number, since it uses as much as digits as its factorization.

1021242243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615666.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1021242243 is about 31956.8809961173. The cubic root of 1021242243 is about 1007.0311941074.

Adding to 1021242243 its reverse (3422421201), we get a palindrome (4443663444).

The spelling of 1021242243 in words is "one billion, twenty-one million, two hundred forty-two thousand, two hundred forty-three".