100231123212001 has 4 divisors (see below), whose sum is σ = 100231144744212. Its totient is φ = 100231101679792.

The previous prime is 100231123211993. The next prime is 100231123212079. The reversal of 100231123212001 is 100212321132001.

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 90216278150625 + 10014845061376 = 9498225^2 + 3164624^2 .

It is a cyclic number.

It is not a de Polignac number, because 100231123212001 - 2³ = 100231123211993 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 100231123212001.

It is not an unprimeable number, because it can be changed into a prime (100231123212401) 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, 556246 + ... + 14169391.

It is an arithmetic number, because the mean of its divisors is an integer number (25057786186053).

Almost surely, 2^{100231123212001} is an apocalyptic number.

It is an amenable number.

100231123212001 is a deficient number, since it is larger than the sum of its proper divisors (21532211).

100231123212001 is an equidigital number, since it uses as much as digits as its factorization.

100231123212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21532210.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 100231123212001 its reverse (100212321132001), we get a palindrome (200443444344002).

The spelling of 100231123212001 in words is "one hundred trillion, two hundred thirty-one billion, one hundred twenty-three million, two hundred twelve thousand, one".