100254223543521 has 4 divisors (see below), whose sum is σ = 133672298058032. Its totient is φ = 66836149029012.

The previous prime is 100254223543519. The next prime is 100254223543543. The reversal of 100254223543521 is 125345322452001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 100254223543521 - 2¹ = 100254223543519 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 100254223543521.

It is not an unprimeable number, because it can be changed into a prime (100254223543501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16709037257251 + ... + 16709037257256.

It is an arithmetic number, because the mean of its divisors is an integer number (33418074514508).

Almost surely, 2^{100254223543521} is an apocalyptic number.

It is an amenable number.

100254223543521 is a deficient number, since it is larger than the sum of its proper divisors (33418074514511).

100254223543521 is an equidigital number, since it uses as much as digits as its factorization.

100254223543521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33418074514510.

The product of its (nonzero) digits is 288000, while the sum is 39.

Adding to 100254223543521 its reverse (125345322452001), we get a palindrome (225599545995522).

The spelling of 100254223543521 in words is "one hundred trillion, two hundred fifty-four billion, two hundred twenty-three million, five hundred forty-three thousand, five hundred twenty-one".