1121221011123 has 24 divisors (see below), whose sum is σ = 1695573144720. Its totient is φ = 713010217920.

The previous prime is 1121221011107. The next prime is 1121221011137. The reversal of 1121221011123 is 3211101221211.

It is a happy number.

It is not a de Polignac number, because 1121221011123 - 2⁴ = 1121221011107 is a prime.

It is a super-2 number, since 2×1121221011123² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1121221011096 and 1121221011105.

It is not an unprimeable number, because it can be changed into a prime (1121221011223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25857048 + ... + 25900373.

It is an arithmetic number, because the mean of its divisors is an integer number (70648881030).

Almost surely, 2^{1121221011123} is an apocalyptic number.

1121221011123 is a deficient number, since it is larger than the sum of its proper divisors (574352133597).

1121221011123 is a wasteful number, since it uses less digits than its factorization.

1121221011123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51757539 (or 51757536 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1121221011123 its reverse (3211101221211), we get a palindrome (4332322232334).

The spelling of 1121221011123 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-one million, eleven thousand, one hundred twenty-three".