1232421543120 has 160 divisors (see below), whose sum is σ = 3902942195712. Its totient is φ = 321558647296.

The previous prime is 1232421543103. The next prime is 1232421543121. The reversal of 1232421543120 is 213451242321.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232421543121) by changing a digit.

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, 43560499 + ... + 43588781.

Almost surely, 2^{1232421543120} is an apocalyptic number.

1232421543120 is a gapful number since it is divisible by the number (10) 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 1232421543120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1951471097856).

1232421543120 is an abundant number, since it is smaller than the sum of its proper divisors (2670520652592).

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

1232421543120 is a wasteful number, since it uses less digits than its factorization.

1232421543120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32209 (or 32203 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 1232421543120 its reverse (213451242321), we get a palindrome (1445872785441).

The spelling of 1232421543120 in words is "one trillion, two hundred thirty-two billion, four hundred twenty-one million, five hundred forty-three thousand, one hundred twenty".