1231534530210 has 64 divisors (see below), whose sum is σ = 3011883212160. Its totient is φ = 322166507520.

The previous prime is 1231534530181. The next prime is 1231534530217. The reversal of 1231534530210 is 120354351321.

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

It is not an unprimeable number, because it can be changed into a prime (1231534530217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11807890 + ... + 11911730.

It is an arithmetic number, because the mean of its divisors is an integer number (47060675190).

Almost surely, 2^{1231534530210} is an apocalyptic number.

1231534530210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231534530210 is an abundant number, since it is smaller than the sum of its proper divisors (1780348681950).

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

1231534530210 is a wasteful number, since it uses less digits than its factorization.

1231534530210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111363.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 1231534530210 its reverse (120354351321), we get a palindrome (1351888881531).

The spelling of 1231534530210 in words is "one trillion, two hundred thirty-one billion, five hundred thirty-four million, five hundred thirty thousand, two hundred ten".