818123101 has 8 divisors (see below), whose sum is σ = 823649504. Its totient is φ = 812615760.

The previous prime is 818123081. The next prime is 818123167. The reversal of 818123101 is 101321818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 818123101 - 2⁵ = 818123069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818124101) 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, 87226 + ... + 96148.

It is an arithmetic number, because the mean of its divisors is an integer number (102956188).

Almost surely, 2^818123101 is an apocalyptic number.

It is an amenable number.

818123101 is a deficient number, since it is larger than the sum of its proper divisors (5526403).

818123101 is a wasteful number, since it uses less digits than its factorization.

818123101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9531.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 818123101 is about 28602.8512739552. The cubic root of 818123101 is about 935.2754870881.

Adding to 818123101 its reverse (101321818), we get a palindrome (919444919).

The spelling of 818123101 in words is "eight hundred eighteen million, one hundred twenty-three thousand, one hundred one".