100423214561 has 4 divisors (see below), whose sum is σ = 100423970052. Its totient is φ = 100422459072.

The previous prime is 100423214527. The next prime is 100423214569. The reversal of 100423214561 is 165412324001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 165412324001 = 1223 ⋅135251287.

It can be written as a sum of positive squares in 2 ways, for example, as 54449422336 + 45973792225 = 233344^2 + 214415^2 .

It is a cyclic number.

It is not a de Polignac number, because 100423214561 - 2¹⁰ = 100423213537 is a prime.

It is a super-3 number, since 3×100423214561³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100423214569) 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, 119516 + ... + 463821.

It is an arithmetic number, because the mean of its divisors is an integer number (25105992513).

Almost surely, 2^100423214561 is an apocalyptic number.

It is an amenable number.

100423214561 is a deficient number, since it is larger than the sum of its proper divisors (755491).

100423214561 is an equidigital number, since it uses as much as digits as its factorization.

100423214561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755490.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 100423214561 its reverse (165412324001), we get a palindrome (265835538562).

The spelling of 100423214561 in words is "one hundred billion, four hundred twenty-three million, two hundred fourteen thousand, five hundred sixty-one".