1123020232121 has 4 divisors (see below), whose sum is σ = 1123028368500. Its totient is φ = 1123012095744.

The previous prime is 1123020232109. The next prime is 1123020232177. The reversal of 1123020232121 is 1212320203211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 610485944896 + 512534287225 = 781336^2 + 715915^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123020232121 - 2²² = 1123016037817 is a prime.

It is a super-2 number, since 2×1123020232121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123020232093 and 1123020232102.

It is not an unprimeable number, because it can be changed into a prime (1123020232021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3857516 + ... + 4138413.

It is an arithmetic number, because the mean of its divisors is an integer number (280757092125).

Almost surely, 2^{1123020232121} is an apocalyptic number.

It is an amenable number.

1123020232121 is a deficient number, since it is larger than the sum of its proper divisors (8136379).

1123020232121 is an equidigital number, since it uses as much as digits as its factorization.

1123020232121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8136378.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1123020232121 its reverse (1212320203211), we get a palindrome (2335340435332).

The spelling of 1123020232121 in words is "one trillion, one hundred twenty-three billion, twenty million, two hundred thirty-two thousand, one hundred twenty-one".