101010121021021 has 4 divisors (see below), whose sum is σ = 101018266354044. Its totient is φ = 101001975688000.

The previous prime is 101010121021013. The next prime is 101010121021097. The reversal of 101010121021021 is 120120121010101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19981570505625 + 81028550515396 = 4470075^2 + 9001586^2 .

It is a cyclic number.

It is not a de Polignac number, because 101010121021021 - 2³ = 101010121021013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101010121020992 and 101010121021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101010121021001) 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, 4072647910 + ... + 4072672711.

It is an arithmetic number, because the mean of its divisors is an integer number (25254566588511).

Almost surely, 2^{101010121021021} is an apocalyptic number.

It is an amenable number.

101010121021021 is a deficient number, since it is larger than the sum of its proper divisors (8145333023).

101010121021021 is an equidigital number, since it uses as much as digits as its factorization.

101010121021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8145333022.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 101010121021021 its reverse (120120121010101), we get a palindrome (221130242031122).

The spelling of 101010121021021 in words is "one hundred one trillion, ten billion, one hundred twenty-one million, twenty-one thousand, twenty-one".