21522401130144 has 48 divisors (see below), whose sum is σ = 56496576693312. Its totient is φ = 7174098951168.

The previous prime is 21522401130137. The next prime is 21522401130149. The reversal of 21522401130144 is 44103110422512.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (21522401130149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26194437 + ... + 27003579.

It is an arithmetic number, because the mean of its divisors is an integer number (1177012014444).

Almost surely, 2^{21522401130144} is an apocalyptic number.

21522401130144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21522401130144 is an abundant number, since it is smaller than the sum of its proper divisors (34974175563168).

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

21522401130144 is a wasteful number, since it uses less digits than its factorization.

21522401130144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086229 (or 1086221 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 21522401130144 its reverse (44103110422512), we get a palindrome (65625511552656).

The spelling of 21522401130144 in words is "twenty-one trillion, five hundred twenty-two billion, four hundred one million, one hundred thirty thousand, one hundred forty-four".