1023243121 has 4 divisors (see below), whose sum is σ = 1023604132. Its totient is φ = 1022882112.

The previous prime is 1023243041. The next prime is 1023243127. The reversal of 1023243121 is 1213423201.

It is a happy number.

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 320410000 + 702833121 = 17900^2 + 26511^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023243121 - 2⁷ = 1023242993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023243127) 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, 176220 + ... + 181933.

It is an arithmetic number, because the mean of its divisors is an integer number (255901033).

Almost surely, 2^1023243121 is an apocalyptic number.

It is an amenable number.

1023243121 is a deficient number, since it is larger than the sum of its proper divisors (361011).

1023243121 is an equidigital number, since it uses as much as digits as its factorization.

1023243121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361010.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1023243121 is about 31988.1715795073. The cubic root of 1023243121 is about 1007.6884433454.

Adding to 1023243121 its reverse (1213423201), we get a palindrome (2236666322).

The spelling of 1023243121 in words is "one billion, twenty-three million, two hundred forty-three thousand, one hundred twenty-one".