100101202021 has 2 divisors, whose sum is σ = 100101202022. Its totient is φ = 100101202020.

The previous prime is 100101202001. The next prime is 100101202063. The reversal of 100101202021 is 120202101001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86267913796 + 13833288225 = 293714^2 + 117615^2 .

It is a cyclic number.

It is not a de Polignac number, because 100101202021 - 2⁹ = 100101201509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100101201989 and 100101202007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100101202001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50050601010 + 50050601011.

It is an arithmetic number, because the mean of its divisors is an integer number (50050601011).

Almost surely, 2^100101202021 is an apocalyptic number.

It is an amenable number.

100101202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100101202021 is an equidigital number, since it uses as much as digits as its factorization.

100101202021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 100101202021 its reverse (120202101001), we get a palindrome (220303303022).

The spelling of 100101202021 in words is "one hundred billion, one hundred one million, two hundred two thousand, twenty-one".