4121003345520 has 160 divisors (see below), whose sum is σ = 13144356207360. Its totient is φ = 1067407329280.

The previous prime is 4121003345509. The next prime is 4121003345533. The reversal of 4121003345520 is 255433001214.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1311211 + ... + 3156149.

It is an arithmetic number, because the mean of its divisors is an integer number (82152226296).

Almost surely, 2^{4121003345520} is an apocalyptic number.

4121003345520 is a gapful number since it is divisible by the number (40) 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 4121003345520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6572178103680).

4121003345520 is an abundant number, since it is smaller than the sum of its proper divisors (9023352861840).

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

4121003345520 is a wasteful number, since it uses less digits than its factorization.

4121003345520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845223 (or 1845217 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 4121003345520 its reverse (255433001214), we get a palindrome (4376436346734).

The spelling of 4121003345520 in words is "four trillion, one hundred twenty-one billion, three million, three hundred forty-five thousand, five hundred twenty".