100111321 has 2 divisors, whose sum is σ = 100111322. Its totient is φ = 100111320.

The previous prime is 100111273. The next prime is 100111327. The reversal of 100111321 is 123111001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80353296 + 19758025 = 8964^2 + 4445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100111321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100111298 and 100111307.

It is not a weakly prime, because it can be changed into another prime (100111327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50055660 + 50055661.

It is an arithmetic number, because the mean of its divisors is an integer number (50055661).

Almost surely, 2^100111321 is an apocalyptic number.

It is an amenable number.

100111321 is a deficient number, since it is larger than the sum of its proper divisors (1).

100111321 is an equidigital number, since it uses as much as digits as its factorization.

100111321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 100111321 is about 10005.5645018160. The cubic root of 100111321 is about 464.3310549262.

Adding to 100111321 its reverse (123111001), we get a palindrome (223222322).

The spelling of 100111321 in words is "one hundred million, one hundred eleven thousand, three hundred twenty-one".