210021011002021 has 16 divisors (see below), whose sum is σ = 223068304368000. Its totient is φ = 197173659691008.

The previous prime is 210021011002003. The next prime is 210021011002063. The reversal of 210021011002021 is 120200110120012.

It is a cyclic number.

It is not a de Polignac number, because 210021011002021 - 2²¹ = 210021008904869 is a prime.

It is a super-2 number, since 2×210021011002021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210021011001992 and 210021011002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021011002321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4754805 + ... + 21039253.

It is an arithmetic number, because the mean of its divisors is an integer number (13941769023000).

Almost surely, 2^{210021011002021} is an apocalyptic number.

It is an amenable number.

210021011002021 is a deficient number, since it is larger than the sum of its proper divisors (13047293365979).

210021011002021 is a wasteful number, since it uses less digits than its factorization.

210021011002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16290588.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210021011002021 its reverse (120200110120012), we get a palindrome (330221121122033).

The spelling of 210021011002021 in words is "two hundred ten trillion, twenty-one billion, eleven million, two thousand, twenty-one".