101010002021 has 4 divisors (see below), whose sum is σ = 101014250700. Its totient is φ = 101005753344.

The previous prime is 101010002011. The next prime is 101010002033. The reversal of 101010002021 is 120200010101.

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 4866597121 + 96143404900 = 69761^2 + 310070^2 .

It is a cyclic number.

It is not a de Polignac number, because 101010002021 - 2¹⁰ = 101010000997 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 (101010002011) 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, 2088476 + ... + 2136293.

It is an arithmetic number, because the mean of its divisors is an integer number (25253562675).

Almost surely, 2^101010002021 is an apocalyptic number.

It is an amenable number.

101010002021 is a deficient number, since it is larger than the sum of its proper divisors (4248679).

101010002021 is an equidigital number, since it uses as much as digits as its factorization.

101010002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248678.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 101010002021 its reverse (120200010101), we get a palindrome (221210012122).

The spelling of 101010002021 in words is "one hundred one billion, ten million, two thousand, twenty-one".