210011211021 has 16 divisors (see below), whose sum is σ = 282897489600. Its totient is φ = 138567283200.

The previous prime is 210011211017. The next prime is 210011211023. The reversal of 210011211021 is 120112110012.

It is not a de Polignac number, because 210011211021 - 2² = 210011211017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210011210988 and 210011211006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210011211023) 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 15 ways as a sum of consecutive naturals, for example, 652030 + ... + 919328.

It is an arithmetic number, because the mean of its divisors is an integer number (17681093100).

Almost surely, 2^210011211021 is an apocalyptic number.

It is an amenable number.

210011211021 is a deficient number, since it is larger than the sum of its proper divisors (72886278579).

210011211021 is a wasteful number, since it uses less digits than its factorization.

210011211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269996.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 210011211021 its reverse (120112110012), we get a palindrome (330123321033).

The spelling of 210011211021 in words is "two hundred ten billion, eleven million, two hundred eleven thousand, twenty-one".