1001212221043 has 2 divisors, whose sum is σ = 1001212221044. Its totient is φ = 1001212221042.

The previous prime is 1001212221017. The next prime is 1001212221127. The reversal of 1001212221043 is 3401222121001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1001212221043 - 2⁵ = 1001212221011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001212221043.

It is not a weakly prime, because it can be changed into another prime (1001212225043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500606110521 + 500606110522.

It is an arithmetic number, because the mean of its divisors is an integer number (500606110522).

Almost surely, 2^{1001212221043} is an apocalyptic number.

1001212221043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001212221043 is an equidigital number, since it uses as much as digits as its factorization.

1001212221043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1001212221043 its reverse (3401222121001), we get a palindrome (4402434342044).

The spelling of 1001212221043 in words is "one trillion, one billion, two hundred twelve million, two hundred twenty-one thousand, forty-three".