1231532212443 has 32 divisors (see below), whose sum is σ = 1797516409920. Its totient is φ = 745370173440.

The previous prime is 1231532212439. The next prime is 1231532212481. The reversal of 1231532212443 is 3442122351321.

It is a happy number.

It is not a de Polignac number, because 1231532212443 - 2² = 1231532212439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231532212403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35079843 + ... + 35114931.

It is an arithmetic number, because the mean of its divisors is an integer number (56172387810).

Almost surely, 2^{1231532212443} is an apocalyptic number.

1231532212443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1231532212443 is a deficient number, since it is larger than the sum of its proper divisors (565984197477).

1231532212443 is a wasteful number, since it uses less digits than its factorization.

1231532212443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49919.

The product of its digits is 34560, while the sum is 33.

Adding to 1231532212443 its reverse (3442122351321), we get a palindrome (4673654563764).

The spelling of 1231532212443 in words is "one trillion, two hundred thirty-one billion, five hundred thirty-two million, two hundred twelve thousand, four hundred forty-three".