2010000100021 has 4 divisors (see below), whose sum is σ = 2020203146412. Its totient is φ = 1999797053632.

The previous prime is 2010000100019. The next prime is 2010000100057. The reversal of 2010000100021 is 1200010000102.

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 1689768607921 + 320231492100 = 1299911^2 + 565890^2 .

It is a cyclic number.

It is not a de Polignac number, because 2010000100021 - 2¹ = 2010000100019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2010000099977 and 2010000100013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2010000100001) 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, 5101522900 + ... + 5101523293.

It is an arithmetic number, because the mean of its divisors is an integer number (505050786603).

Almost surely, 2^{2010000100021} is an apocalyptic number.

It is an amenable number.

2010000100021 is a deficient number, since it is larger than the sum of its proper divisors (10203046391).

2010000100021 is a wasteful number, since it uses less digits than its factorization.

2010000100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10203046390.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 2010000100021 its reverse (1200010000102), we get a palindrome (3210010100123).

The spelling of 2010000100021 in words is "two trillion, ten billion, one hundred thousand, twenty-one".