210021012001 has 4 divisors (see below), whose sum is σ = 210042234004. Its totient is φ = 209999790000.

The previous prime is 210021011947. The next prime is 210021012013. The reversal of 210021012001 is 100210120012.

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 91612760976 + 118408251025 = 302676^2 + 344105^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021012001 - 2⁹ = 210021011489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210028012001) 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, 10596150 + ... + 10615951.

It is an arithmetic number, because the mean of its divisors is an integer number (52510558501).

Almost surely, 2^210021012001 is an apocalyptic number.

It is an amenable number.

210021012001 is a deficient number, since it is larger than the sum of its proper divisors (21222003).

210021012001 is an equidigital number, since it uses as much as digits as its factorization.

210021012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21222002.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 210021012001 its reverse (100210120012), we get a palindrome (310231132013).

It can be divided in two parts, 2 and 10021012001, that multiplied together give a palindrome (20042024002).

The spelling of 210021012001 in words is "two hundred ten billion, twenty-one million, twelve thousand, one".