1232422223521 has 4 divisors (see below), whose sum is σ = 1304917648452. Its totient is φ = 1159926798592.

The previous prime is 1232422223519. The next prime is 1232422223603. The reversal of 1232422223521 is 1253222242321.

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 758224719121 + 474197504400 = 870761^2 + 688620^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232422223521 - 2¹ = 1232422223519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1232422923521) 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, 36247712440 + ... + 36247712473.

It is an arithmetic number, because the mean of its divisors is an integer number (326229412113).

Almost surely, 2^{1232422223521} is an apocalyptic number.

It is an amenable number.

1232422223521 is a deficient number, since it is larger than the sum of its proper divisors (72495424931).

1232422223521 is an equidigital number, since it uses as much as digits as its factorization.

1232422223521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72495424930.

The product of its digits is 23040, while the sum is 31.

Adding to 1232422223521 its reverse (1253222242321), we get a palindrome (2485644465842).

The spelling of 1232422223521 in words is "one trillion, two hundred thirty-two billion, four hundred twenty-two million, two hundred twenty-three thousand, five hundred twenty-one".