13121154420 has 96 divisors (see below), whose sum is σ = 40476191616. Its totient is φ = 3149376000.

The previous prime is 13121154413. The next prime is 13121154433. The reversal of 13121154420 is 2445112131.

13121154420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31759 + ... + 165078.

It is an arithmetic number, because the mean of its divisors is an integer number (421626996).

Almost surely, 2^13121154420 is an apocalyptic number.

13121154420 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 13121154420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20238095808).

13121154420 is an abundant number, since it is smaller than the sum of its proper divisors (27355037196).

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

13121154420 is a wasteful number, since it uses less digits than its factorization.

13121154420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196961 (or 196959 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 13121154420 its reverse (2445112131), we get a palindrome (15566266551).

The spelling of 13121154420 in words is "thirteen billion, one hundred twenty-one million, one hundred fifty-four thousand, four hundred twenty".