210001020002021 has 8 divisors (see below), whose sum is σ = 212169747439104. Its totient is φ = 207832369472640.

The previous prime is 210001020002017. The next prime is 210001020002087. The reversal of 210001020002021 is 120200020100012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210001020002021 - 2² = 210001020002017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210001020001993 and 210001020002011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210001020002821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13729535 + ... + 24667836.

It is an arithmetic number, because the mean of its divisors is an integer number (26521218429888).

Almost surely, 2^{210001020002021} is an apocalyptic number.

It is an amenable number.

210001020002021 is a deficient number, since it is larger than the sum of its proper divisors (2168727437083).

210001020002021 is an equidigital number, since it uses as much as digits as its factorization.

210001020002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38453851.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 210001020002021 its reverse (120200020100012), we get a palindrome (330201040102033).

The spelling of 210001020002021 in words is "two hundred ten trillion, one billion, twenty million, two thousand, twenty-one".