1123123023021 has 32 divisors (see below), whose sum is σ = 1536260318208. Its totient is φ = 729681605120.

The previous prime is 1123123022981. The next prime is 1123123023041. The reversal of 1123123023021 is 1203203213211.

It is not a de Polignac number, because 1123123023021 - 2¹⁹ = 1123122498733 is a prime.

It is a super-2 number, since 2×1123123023021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123123023041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5344285 + ... + 5550461.

It is an arithmetic number, because the mean of its divisors is an integer number (48008134944).

Almost surely, 2^{1123123023021} is an apocalyptic number.

It is an amenable number.

1123123023021 is a deficient number, since it is larger than the sum of its proper divisors (413137295187).

1123123023021 is a wasteful number, since it uses less digits than its factorization.

1123123023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206561.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1123123023021 its reverse (1203203213211), we get a palindrome (2326326236232).

The spelling of 1123123023021 in words is "one trillion, one hundred twenty-three billion, one hundred twenty-three million, twenty-three thousand, twenty-one".