100123201 has 4 divisors (see below), whose sum is σ = 102012372. Its totient is φ = 98234032.

The previous prime is 100123193. The next prime is 100123213. The reversal of 100123201 is 102321001.

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 75272976 + 24850225 = 8676^2 + 4985^2 .

It is a cyclic number.

It is not a de Polignac number, because 100123201 - 2³ = 100123193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100123241) 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, 944506 + ... + 944611.

It is an arithmetic number, because the mean of its divisors is an integer number (25503093).

Almost surely, 2^100123201 is an apocalyptic number.

It is an amenable number.

100123201 is a deficient number, since it is larger than the sum of its proper divisors (1889171).

100123201 is an equidigital number, since it uses as much as digits as its factorization.

100123201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889170.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 100123201 is about 10006.1581538571. The cubic root of 100123201 is about 464.3494212631.

Adding to 100123201 its reverse (102321001), we get a palindrome (202444202).

It can be divided in two parts, 100 and 123201, that multiplied together give a square (12320100 = 3510²).

The spelling of 100123201 in words is "one hundred million, one hundred twenty-three thousand, two hundred one".