1111021221043 has 2 divisors, whose sum is σ = 1111021221044. Its totient is φ = 1111021221042.

The previous prime is 1111021220999. The next prime is 1111021221077. The reversal of 1111021221043 is 3401221201111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111021221043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1111021221043.

It is not a weakly prime, because it can be changed into another prime (1111021221643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555510610521 + 555510610522.

It is an arithmetic number, because the mean of its divisors is an integer number (555510610522).

Almost surely, 2^{1111021221043} is an apocalyptic number.

1111021221043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111021221043 is an equidigital number, since it uses as much as digits as its factorization.

1111021221043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1111021221043 its reverse (3401221201111), we get a palindrome (4512242422154).

The spelling of 1111021221043 in words is "one trillion, one hundred eleven billion, twenty-one million, two hundred twenty-one thousand, forty-three".