1123121001043 has 2 divisors, whose sum is σ = 1123121001044. Its totient is φ = 1123121001042.

The previous prime is 1123121001019. The next prime is 1123121001061. The reversal of 1123121001043 is 3401001213211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123121001043 - 2¹⁷ = 1123120869971 is a prime.

It is a super-2 number, since 2×1123121001043² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1123121001043.

It is not a weakly prime, because it can be changed into another prime (1123121001143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561560500521 + 561560500522.

It is an arithmetic number, because the mean of its divisors is an integer number (561560500522).

Almost surely, 2^{1123121001043} is an apocalyptic number.

1123121001043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123121001043 is an equidigital number, since it uses as much as digits as its factorization.

1123121001043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1123121001043 its reverse (3401001213211), we get a palindrome (4524122214254).

The spelling of 1123121001043 in words is "one trillion, one hundred twenty-three billion, one hundred twenty-one million, one thousand, forty-three".