100320211021 has 2 divisors, whose sum is σ = 100320211022. Its totient is φ = 100320211020.

The previous prime is 100320211001. The next prime is 100320211027. The reversal of 100320211021 is 120112023001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72959412100 + 27360798921 = 270110^2 + 165411^2 .

It is an emirp because it is prime and its reverse (120112023001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100320211021 - 2⁵ = 100320210989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100320210992 and 100320211010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100320211027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50160105510 + 50160105511.

It is an arithmetic number, because the mean of its divisors is an integer number (50160105511).

Almost surely, 2^100320211021 is an apocalyptic number.

It is an amenable number.

100320211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100320211021 is an equidigital number, since it uses as much as digits as its factorization.

100320211021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 100320211021 its reverse (120112023001), we get a palindrome (220432234022).

The spelling of 100320211021 in words is "one hundred billion, three hundred twenty million, two hundred eleven thousand, twenty-one".