101423255521 has 4 divisors (see below), whose sum is σ = 115912292032. Its totient is φ = 86934219012.

The previous prime is 101423255513. The next prime is 101423255561. The reversal of 101423255521 is 125552324101.

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 a cyclic number.

It is not a de Polignac number, because 101423255521 - 2³ = 101423255513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101423255561) 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, 7244518245 + ... + 7244518258.

It is an arithmetic number, because the mean of its divisors is an integer number (28978073008).

Almost surely, 2^101423255521 is an apocalyptic number.

It is an amenable number.

101423255521 is a deficient number, since it is larger than the sum of its proper divisors (14489036511).

101423255521 is an equidigital number, since it uses as much as digits as its factorization.

101423255521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14489036510.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 101423255521 its reverse (125552324101), we get a palindrome (226975579622).

The spelling of 101423255521 in words is "one hundred one billion, four hundred twenty-three million, two hundred fifty-five thousand, five hundred twenty-one".