210021000210011 has 4 divisors (see below), whose sum is σ = 210081752599992. Its totient is φ = 209960247820032.

The previous prime is 210021000210001. The next prime is 210021000210023. The reversal of 210021000210011 is 110012000120012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 210021000210011 - 2¹⁸ = 210020999947867 is a prime.

It is a super-2 number, since 2×210021000210011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210021000209974 and 210021000210001.

It is not an unprimeable number, because it can be changed into a prime (210021000210001) 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, 30376189805 + ... + 30376196718.

It is an arithmetic number, because the mean of its divisors is an integer number (52520438149998).

Almost surely, 2^{210021000210011} is an apocalyptic number.

210021000210011 is a deficient number, since it is larger than the sum of its proper divisors (60752389981).

210021000210011 is an equidigital number, since it uses as much as digits as its factorization.

210021000210011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60752389980.

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

Adding to 210021000210011 its reverse (110012000120012), we get a palindrome (320033000330023).

The spelling of 210021000210011 in words is "two hundred ten trillion, twenty-one billion, two hundred ten thousand, eleven".