13453121000000 has 784 divisors, whose sum is σ = 39004375737600. Its totient is φ = 4551840000000.

The previous prime is 13453120999963. The next prime is 13453121000021. The reversal of 13453121000000 is 12135431.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 12330999455 + ... + 12331000545.

Almost surely, 2^{13453121000000} is an apocalyptic number.

13453121000000 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 13453121000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19502187868800).

13453121000000 is an abundant number, since it is smaller than the sum of its proper divisors (25551254737600).

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

13453121000000 is an equidigital number, since it uses as much as digits as its factorization.

13453121000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222 (or 1187 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 13453121000000 its reverse (12135431), we get a palindrome (13453133135431).

The spelling of 13453121000000 in words is "thirteen trillion, four hundred fifty-three billion, one hundred twenty-one million", and thus it is an aban number.