100003210123021 has 2 divisors, whose sum is σ = 100003210123022. Its totient is φ = 100003210123020.

The previous prime is 100003210122889. The next prime is 100003210123057. The reversal of 100003210123021 is 120321012300001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54283150644100 + 45720059478921 = 7367710^2 + 6761661^2 .

It is a cyclic number.

It is not a de Polignac number, because 100003210123021 - 2²¹ = 100003208025869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100003210122986 and 100003210123004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100003210123081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50001605061510 + 50001605061511.

It is an arithmetic number, because the mean of its divisors is an integer number (50001605061511).

Almost surely, 2^{100003210123021} is an apocalyptic number.

It is an amenable number.

100003210123021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100003210123021 is an equidigital number, since it uses as much as digits as its factorization.

100003210123021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 100003210123021 its reverse (120321012300001), we get a palindrome (220324222423022).

The spelling of 100003210123021 in words is "one hundred trillion, three billion, two hundred ten million, one hundred twenty-three thousand, twenty-one".