1000000210021 has 8 divisors (see below), whose sum is σ = 1032278526464. Its totient is φ = 967723158960.

The previous prime is 1000000210007. The next prime is 1000000210043. The reversal of 1000000210021 is 1200120000001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000000210021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000000209986 and 1000000210013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000000210051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1445560 + ... + 2022286.

It is an arithmetic number, because the mean of its divisors is an integer number (129034815808).

Almost surely, 2^{1000000210021} is an apocalyptic number.

It is an amenable number.

1000000210021 is a deficient number, since it is larger than the sum of its proper divisors (32278316443).

1000000210021 is an equidigital number, since it uses as much as digits as its factorization.

1000000210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632691.

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

Adding to 1000000210021 its reverse (1200120000001), we get a palindrome (2200120210022).

The spelling of 1000000210021 in words is "one trillion, two hundred ten thousand, twenty-one".