4221523101520 has 80 divisors (see below), whose sum is σ = 10096601811840. Its totient is φ = 1640316206592.

The previous prime is 4221523101463. The next prime is 4221523101527. The reversal of 4221523101520 is 251013251224.

It is a happy number.

4221523101520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221523101527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 680229 + ... + 2984251.

It is an arithmetic number, because the mean of its divisors is an integer number (126207522648).

Almost surely, 2^{4221523101520} is an apocalyptic number.

4221523101520 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 4221523101520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5048300905920).

4221523101520 is an abundant number, since it is smaller than the sum of its proper divisors (5875078710320).

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

4221523101520 is a wasteful number, since it uses less digits than its factorization.

4221523101520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304692 (or 2304686 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 4221523101520 its reverse (251013251224), we get a palindrome (4472536352744).

The spelling of 4221523101520 in words is "four trillion, two hundred twenty-one billion, five hundred twenty-three million, one hundred one thousand, five hundred twenty".