1021212043 has 2 divisors, whose sum is σ = 1021212044. Its totient is φ = 1021212042.

The previous prime is 1021212007. The next prime is 1021212047. The reversal of 1021212043 is 3402121201.

It is a strong prime.

It is an emirp because it is prime and its reverse (3402121201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021212043 - 2²¹ = 1019114891 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021212047) 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 as a sum of consecutive naturals, namely, 510606021 + 510606022.

It is an arithmetic number, because the mean of its divisors is an integer number (510606022).

Almost surely, 2^1021212043 is an apocalyptic number.

1021212043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021212043 is an equidigital number, since it uses as much as digits as its factorization.

1021212043 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 1021212043 is about 31956.4084809291. The cubic root of 1021212043 is about 1007.0212674251.

Adding to 1021212043 its reverse (3402121201), we get a palindrome (4423333244).

The spelling of 1021212043 in words is "one billion, twenty-one million, two hundred twelve thousand, forty-three".