1231340211432 has 128 divisors (see below), whose sum is σ = 3462797721600. Its totient is φ = 405386783424.

The previous prime is 1231340211427. The next prime is 1231340211443. The reversal of 1231340211432 is 2341120431321.

1231340211432 is a `hidden beast` number, since 1 + 2 + 3 + 13 + 4 + 0 + 211 + 432 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1231340211396 and 1231340211405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6016693 + ... + 6217979.

It is an arithmetic number, because the mean of its divisors is an integer number (27053107200).

Almost surely, 2^{1231340211432} is an apocalyptic number.

1231340211432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231340211432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1731398860800).

1231340211432 is an abundant number, since it is smaller than the sum of its proper divisors (2231457510168).

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

1231340211432 is a wasteful number, since it uses less digits than its factorization.

1231340211432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201652 (or 201642 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 1231340211432 its reverse (2341120431321), we get a palindrome (3572460642753).

The spelling of 1231340211432 in words is "one trillion, two hundred thirty-one billion, three hundred forty million, two hundred eleven thousand, four hundred thirty-two".