21501550150052 has 96 divisors (see below), whose sum is σ = 45617628069888. Its totient is φ = 8668428430464.

The previous prime is 21501550150051. The next prime is 21501550150063. The reversal of 21501550150052 is 25005105510512.

It is not an unprimeable number, because it can be changed into a prime (21501550150051) by changing a digit.

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, 25780358 + ... + 26601314.

It is an arithmetic number, because the mean of its divisors is an integer number (475183625728).

Almost surely, 2^{21501550150052} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21501550150052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22808814034944).

21501550150052 is an abundant number, since it is smaller than the sum of its proper divisors (24116077919836).

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

21501550150052 is a wasteful number, since it uses less digits than its factorization.

21501550150052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821665 (or 821663 counting only the distinct ones).

The product of its (nonzero) digits is 12500, while the sum is 32.

Adding to 21501550150052 its reverse (25005105510512), we get a palindrome (46506655660564).

The spelling of 21501550150052 in words is "twenty-one trillion, five hundred one billion, five hundred fifty million, one hundred fifty thousand, fifty-two".