101010110020021 has 4 divisors (see below), whose sum is σ = 103359182346112. Its totient is φ = 98661037693932.

The previous prime is 101010110020013. The next prime is 101010110020031. The reversal of 101010110020021 is 120020011010101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101010110020021 - 2³ = 101010110020013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101010110020031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1174536162981 + ... + 1174536163066.

It is an arithmetic number, because the mean of its divisors is an integer number (25839795586528).

Almost surely, 2^{101010110020021} is an apocalyptic number.

It is an amenable number.

101010110020021 is a deficient number, since it is larger than the sum of its proper divisors (2349072326091).

101010110020021 is an equidigital number, since it uses as much as digits as its factorization.

101010110020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2349072326090.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 101010110020021 its reverse (120020011010101), we get a palindrome (221030121030122).

The spelling of 101010110020021 in words is "one hundred one trillion, ten billion, one hundred ten million, twenty thousand, twenty-one".