101020021021 has 16 divisors (see below), whose sum is σ = 106791237504. Its totient is φ = 95366107584.

The previous prime is 101020021019. The next prime is 101020021057. The reversal of 101020021021 is 120120020101.

It is not a de Polignac number, because 101020021021 - 2¹ = 101020021019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101020020989 and 101020021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101020021061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1876735 + ... + 1929811.

It is an arithmetic number, because the mean of its divisors is an integer number (6674452344).

Almost surely, 2^101020021021 is an apocalyptic number.

It is an amenable number.

101020021021 is a deficient number, since it is larger than the sum of its proper divisors (5771216483).

101020021021 is an equidigital number, since it uses as much as digits as its factorization.

101020021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54180.

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

Adding to 101020021021 its reverse (120120020101), we get a palindrome (221140041122).

The spelling of 101020021021 in words is "one hundred one billion, twenty million, twenty-one thousand, twenty-one".