1232113021 has 4 divisors (see below), whose sum is σ = 1232183232. Its totient is φ = 1232042812.

The previous prime is 1232112997. The next prime is 1232113081. The reversal of 1232113021 is 1203112321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1203112321 = 17 ⋅70771313.

It is a cyclic number.

It is not a de Polignac number, because 1232113021 - 2²¹ = 1230015869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1232112986 and 1232113004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232113081) 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, 16806 + ... + 52408.

It is an arithmetic number, because the mean of its divisors is an integer number (308045808).

Almost surely, 2^1232113021 is an apocalyptic number.

It is an amenable number.

1232113021 is a deficient number, since it is larger than the sum of its proper divisors (70211).

1232113021 is an equidigital number, since it uses as much as digits as its factorization.

1232113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70210.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1232113021 is about 35101.4675049349. The cubic root of 1232113021 is about 1072.0544628364.

Adding to 1232113021 its reverse (1203112321), we get a palindrome (2435225342).

The spelling of 1232113021 in words is "one billion, two hundred thirty-two million, one hundred thirteen thousand, twenty-one".