210010211021021 has 4 divisors (see below), whose sum is σ = 210140895659232. Its totient is φ = 209879526382812.

The previous prime is 210010211020997. The next prime is 210010211021047. The reversal of 210010211021021 is 120120112010012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210010211021021 - 2⁴⁶ = 139641466843357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210010211020987 and 210010211021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210010211071021) 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, 65342316695 + ... + 65342319908.

It is an arithmetic number, because the mean of its divisors is an integer number (52535223914808).

Almost surely, 2^{210010211021021} is an apocalyptic number.

It is an amenable number.

210010211021021 is a deficient number, since it is larger than the sum of its proper divisors (130684638211).

210010211021021 is a wasteful number, since it uses less digits than its factorization.

210010211021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130684638210.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210010211021021 its reverse (120120112010012), we get a palindrome (330130323031033).

The spelling of 210010211021021 in words is "two hundred ten trillion, ten billion, two hundred eleven million, twenty-one thousand, twenty-one".