100211321 has 6 divisors (see below), whose sum is σ = 116572410. Its totient is φ = 85895376.

The previous prime is 100211303. The next prime is 100211329. The reversal of 100211321 is 123112001.

It can be written as a sum of positive squares in only one way, i.e., 92371321 + 7840000 = 9611^2 + 2800^2 .

It is not a de Polignac number, because 100211321 - 2¹⁴ = 100194937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100211329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1022516 + ... + 1022613.

It is an arithmetic number, because the mean of its divisors is an integer number (19428735).

Almost surely, 2^100211321 is an apocalyptic number.

It is an amenable number.

100211321 is a deficient number, since it is larger than the sum of its proper divisors (16361089).

100211321 is an equidigital number, since it uses as much as digits as its factorization.

100211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045143 (or 2045136 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 100211321 is about 10010.5604738196. The cubic root of 100211321 is about 464.4856083877.

Adding to 100211321 its reverse (123112001), we get a palindrome (223323322).

The spelling of 100211321 in words is "one hundred million, two hundred eleven thousand, three hundred twenty-one".