100232320121 has 4 divisors (see below), whose sum is σ = 100242292644. Its totient is φ = 100222347600.

The previous prime is 100232320081. The next prime is 100232320141. The reversal of 100232320121 is 121023232001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51640290025 + 48592030096 = 227245^2 + 220436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100232320121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100232320121.

It is not an unprimeable number, because it can be changed into a prime (100232320141) 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, 4971170 + ... + 4991291.

It is an arithmetic number, because the mean of its divisors is an integer number (25060573161).

Almost surely, 2^100232320121 is an apocalyptic number.

It is an amenable number.

100232320121 is a deficient number, since it is larger than the sum of its proper divisors (9972523).

100232320121 is an equidigital number, since it uses as much as digits as its factorization.

100232320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9972522.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 100232320121 its reverse (121023232001), we get a palindrome (221255552122).

The spelling of 100232320121 in words is "one hundred billion, two hundred thirty-two million, three hundred twenty thousand, one hundred twenty-one".