1231451135040 has 112 divisors (see below), whose sum is σ = 4468408428672. Its totient is φ = 281474543616.

The previous prime is 1231451135021. The next prime is 1231451135041. The reversal of 1231451135040 is 405311541321.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1231451134989 and 1231451135007.

It is not an unprimeable number, because it can be changed into a prime (1231451135041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91619109 + ... + 91632548.

Almost surely, 2^{1231451135040} is an apocalyptic number.

1231451135040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231451135040 is an abundant number, since it is smaller than the sum of its proper divisors (3236957293632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231451135040 is a wasteful number, since it uses less digits than its factorization.

1231451135040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183251684 (or 183251674 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 1231451135040 its reverse (405311541321), we get a palindrome (1636762676361).

The spelling of 1231451135040 in words is "one trillion, two hundred thirty-one billion, four hundred fifty-one million, one hundred thirty-five thousand, forty".