1231534434501 has 20 divisors (see below), whose sum is σ = 2102513815072. Its totient is φ = 703733962248.

The previous prime is 1231534434497. The next prime is 1231534434503. The reversal of 1231534434501 is 1054344351321.

1231534434501 is a `hidden beast` number, since 1 + 2 + 31 + 53 + 44 + 34 + 501 = 666.

It is not a de Polignac number, because 1231534434501 - 2² = 1231534434497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231534434503) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1086008635 + ... + 1086009768.

Almost surely, 2^{1231534434501} is an apocalyptic number.

It is an amenable number.

1231534434501 is a deficient number, since it is larger than the sum of its proper divisors (870979380571).

1231534434501 is an equidigital number, since it uses as much as digits as its factorization.

1231534434501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172018422 (or 2172018413 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 1231534434501 its reverse (1054344351321), we get a palindrome (2285878785822).

The spelling of 1231534434501 in words is "one trillion, two hundred thirty-one billion, five hundred thirty-four million, four hundred thirty-four thousand, five hundred one".