1011211221043 has 2 divisors, whose sum is σ = 1011211221044. Its totient is φ = 1011211221042.

The previous prime is 1011211221019. The next prime is 1011211221127. The reversal of 1011211221043 is 3401221121101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1011211221043 - 2⁹ = 1011211220531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011211221043.

It is not a weakly prime, because it can be changed into another prime (1011211221443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505605610521 + 505605610522.

It is an arithmetic number, because the mean of its divisors is an integer number (505605610522).

Almost surely, 2^{1011211221043} is an apocalyptic number.

1011211221043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011211221043 is an equidigital number, since it uses as much as digits as its factorization.

1011211221043 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 19.

Adding to 1011211221043 its reverse (3401221121101), we get a palindrome (4412432342144).

The spelling of 1011211221043 in words is "one trillion, eleven billion, two hundred eleven million, two hundred twenty-one thousand, forty-three".