210010001021021 has 4 divisors (see below), whose sum is σ = 211005309082944. Its totient is φ = 209014692959100.

The previous prime is 210010001020921. The next prime is 210010001021123. The reversal of 210010001021021 is 120120100010012.

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 a de Polignac number, because none of the positive numbers 2^k-210010001021021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210010001020993 and 210010001021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210010001021921) 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, 497654030645 + ... + 497654031066.

It is an arithmetic number, because the mean of its divisors is an integer number (52751327270736).

Almost surely, 2^{210010001021021} is an apocalyptic number.

It is an amenable number.

210010001021021 is a deficient number, since it is larger than the sum of its proper divisors (995308061923).

210010001021021 is an equidigital number, since it uses as much as digits as its factorization.

210010001021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995308061922.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210010001021021 its reverse (120120100010012), we get a palindrome (330130101031033).

The spelling of 210010001021021 in words is "two hundred ten trillion, ten billion, one million, twenty-one thousand, twenty-one".