100311443021 has 2 divisors, whose sum is σ = 100311443022. Its totient is φ = 100311443020.

The previous prime is 100311443009. The next prime is 100311443069. The reversal of 100311443021 is 120344113001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66261967396 + 34049475625 = 257414^2 + 184525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100311443021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100311442984 and 100311443002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100311433021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50155721510 + 50155721511.

It is an arithmetic number, because the mean of its divisors is an integer number (50155721511).

Almost surely, 2^100311443021 is an apocalyptic number.

It is an amenable number.

100311443021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100311443021 is an equidigital number, since it uses as much as digits as its factorization.

100311443021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 100311443021 its reverse (120344113001), we get a palindrome (220655556022).

The spelling of 100311443021 in words is "one hundred billion, three hundred eleven million, four hundred forty-three thousand, twenty-one".