1121001001123 has 16 divisors (see below), whose sum is σ = 1130309484480. Its totient is φ = 1111737230464.

The previous prime is 1121001001097. The next prime is 1121001001139. The reversal of 1121001001123 is 3211001001211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1121001001123 - 2⁹ = 1121001000611 is a prime.

It is a super-2 number, since 2×1121001001123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121001701123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105619965 + ... + 105630577.

It is an arithmetic number, because the mean of its divisors is an integer number (70644342780).

Almost surely, 2^{1121001001123} is an apocalyptic number.

1121001001123 is a deficient number, since it is larger than the sum of its proper divisors (9308483357).

1121001001123 is a wasteful number, since it uses less digits than its factorization.

1121001001123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12638.

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

Adding to 1121001001123 its reverse (3211001001211), we get a palindrome (4332002002334).

The spelling of 1121001001123 in words is "one trillion, one hundred twenty-one billion, one million, one thousand, one hundred twenty-three".