100021100212021 has 2 divisors, whose sum is σ = 100021100212022. Its totient is φ = 100021100212020.

The previous prime is 100021100211997. The next prime is 100021100212031. The reversal of 100021100212021 is 120212001120001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53547416112100 + 46473684099921 = 7317610^2 + 6817161^2 .

It is a cyclic number.

It is not a de Polignac number, because 100021100212021 - 2²³ = 100021091823413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100021100211992 and 100021100212010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100021100212031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010550106010 + 50010550106011.

It is an arithmetic number, because the mean of its divisors is an integer number (50010550106011).

Almost surely, 2^{100021100212021} is an apocalyptic number.

It is an amenable number.

100021100212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021100212021 is an equidigital number, since it uses as much as digits as its factorization.

100021100212021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 100021100212021 its reverse (120212001120001), we get a palindrome (220233101332022).

The spelling of 100021100212021 in words is "one hundred trillion, twenty-one billion, one hundred million, two hundred twelve thousand, twenty-one".