210012021021 has 8 divisors (see below), whose sum is σ = 305472030624. Its totient is φ = 127280012720.

The previous prime is 210012021017. The next prime is 210012021067. The reversal of 210012021021 is 120120210012.

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 210012021021 - 2² = 210012021017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210012020988 and 210012021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210012022021) 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, 3182000286 + ... + 3182000351.

It is an arithmetic number, because the mean of its divisors is an integer number (38184003828).

Almost surely, 2^210012021021 is an apocalyptic number.

It is an amenable number.

210012021021 is a deficient number, since it is larger than the sum of its proper divisors (95460009603).

210012021021 is a wasteful number, since it uses less digits than its factorization.

210012021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6364000651.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210012021021 its reverse (120120210012), we get a palindrome (330132231033).

The spelling of 210012021021 in words is "two hundred ten billion, twelve million, twenty-one thousand, twenty-one".