1121123113021 has 16 divisors (see below), whose sum is σ = 1201619261376. Its totient is φ = 1042300231936.

The previous prime is 1121123113013. The next prime is 1121123113031. The reversal of 1121123113021 is 1203113211211.

It is a cyclic number.

It is not a de Polignac number, because 1121123113021 - 2³ = 1121123113013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121123113021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121123113001) 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, 256906 + ... + 1519291.

It is an arithmetic number, because the mean of its divisors is an integer number (75101203836).

Almost surely, 2^{1121123113021} is an apocalyptic number.

It is an amenable number.

1121123113021 is a deficient number, since it is larger than the sum of its proper divisors (80496148355).

1121123113021 is a wasteful number, since it uses less digits than its factorization.

1121123113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776668.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1121123113021 its reverse (1203113211211), we get a palindrome (2324236324232).

The spelling of 1121123113021 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-three million, one hundred thirteen thousand, twenty-one".