101020012021 has 2 divisors, whose sum is σ = 101020012022. Its totient is φ = 101020012020.

The previous prime is 101020012007. The next prime is 101020012063. The reversal of 101020012021 is 120210020101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95797059121 + 5222952900 = 309511^2 + 72270^2 .

It is a cyclic number.

It is not a de Polignac number, because 101020012021 - 2¹¹ = 101020009973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101020011989 and 101020012007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101020012001) 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, 50510006010 + 50510006011.

It is an arithmetic number, because the mean of its divisors is an integer number (50510006011).

Almost surely, 2^101020012021 is an apocalyptic number.

It is an amenable number.

101020012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

101020012021 is an equidigital number, since it uses as much as digits as its factorization.

101020012021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 101020012021 its reverse (120210020101), we get a palindrome (221230032122).

The spelling of 101020012021 in words is "one hundred one billion, twenty million, twelve thousand, twenty-one".