100102020220021 has 2 divisors, whose sum is σ = 100102020220022. Its totient is φ = 100102020220020.

The previous prime is 100102020219967. The next prime is 100102020220063. The reversal of 100102020220021 is 120022020201001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92346430187025 + 7755590032996 = 9609705^2 + 2784886^2 .

It is a cyclic number.

It is not a de Polignac number, because 100102020220021 - 2¹³ = 100102020211829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100102020219983 and 100102020220010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100102020227021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50051010110010 + 50051010110011.

It is an arithmetic number, because the mean of its divisors is an integer number (50051010110011).

Almost surely, 2^{100102020220021} is an apocalyptic number.

It is an amenable number.

100102020220021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100102020220021 is an equidigital number, since it uses as much as digits as its factorization.

100102020220021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 100102020220021 its reverse (120022020201001), we get a palindrome (220124040421022).

The spelling of 100102020220021 in words is "one hundred trillion, one hundred two billion, twenty million, two hundred twenty thousand, twenty-one".