100440021225 has 24 divisors (see below), whose sum is σ = 168783151552. Its totient is φ = 52689844800.

The previous prime is 100440021191. The next prime is 100440021239. The reversal of 100440021225 is 522120044001.

It is not a de Polignac number, because 100440021225 - 2¹⁰ = 100440020201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10972477 + ... + 10981626.

Almost surely, 2^100440021225 is an apocalyptic number.

100440021225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100440021225 is a deficient number, since it is larger than the sum of its proper divisors (68343130327).

100440021225 is a wasteful number, since it uses less digits than its factorization.

100440021225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21954177 (or 21954172 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 100440021225 its reverse (522120044001), we get a palindrome (622560065226).

The spelling of 100440021225 in words is "one hundred billion, four hundred forty million, twenty-one thousand, two hundred twenty-five".