1234521235231 has 4 divisors (see below), whose sum is σ = 1235027811832. Its totient is φ = 1234014658632.

The previous prime is 1234521235223. The next prime is 1234521235253. The reversal of 1234521235231 is 1325321254321.

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

It is a cyclic number.

It is not a de Polignac number, because 1234521235231 - 2³ = 1234521235223 is a prime.

It is a super-2 number, since 2×1234521235231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234521535231) 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, 253284645 + ... + 253289518.

It is an arithmetic number, because the mean of its divisors is an integer number (308756952958).

Almost surely, 2^{1234521235231} is an apocalyptic number.

1234521235231 is a deficient number, since it is larger than the sum of its proper divisors (506576601).

1234521235231 is an equidigital number, since it uses as much as digits as its factorization.

1234521235231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506576600.

The product of its digits is 43200, while the sum is 34.

Adding to 1234521235231 its reverse (1325321254321), we get a palindrome (2559842489552).

The spelling of 1234521235231 in words is "one trillion, two hundred thirty-four billion, five hundred twenty-one million, two hundred thirty-five thousand, two hundred thirty-one".