1001121001123 has 2 divisors, whose sum is σ = 1001121001124. Its totient is φ = 1001121001122.

The previous prime is 1001121001093. The next prime is 1001121001211. The reversal of 1001121001123 is 3211001211001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001121001123 is a prime.

It is a super-2 number, since 2×1001121001123² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1001121004123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500560500561 + 500560500562.

It is an arithmetic number, because the mean of its divisors is an integer number (500560500562).

Almost surely, 2^{1001121001123} is an apocalyptic number.

1001121001123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001121001123 is an equidigital number, since it uses as much as digits as its factorization.

1001121001123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1001121001123 its reverse (3211001211001), we get a palindrome (4212122212124).

The spelling of 1001121001123 in words is "one trillion, one billion, one hundred twenty-one million, one thousand, one hundred twenty-three".