210221231011 has 4 divisors (see below), whose sum is σ = 229332252024. Its totient is φ = 191110210000.

The previous prime is 210221230981. The next prime is 210221231021. The reversal of 210221231011 is 110132122012.

210221231011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 210221231011 - 2⁷ = 210221230883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210221231021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9555510490 + ... + 9555510511.

It is an arithmetic number, because the mean of its divisors is an integer number (57333063006).

Almost surely, 2^210221231011 is an apocalyptic number.

210221231011 is a deficient number, since it is larger than the sum of its proper divisors (19111021013).

210221231011 is a wasteful number, since it uses less digits than its factorization.

210221231011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19111021012.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 210221231011 its reverse (110132122012), we get a palindrome (320353353023).

The spelling of 210221231011 in words is "two hundred ten billion, two hundred twenty-one million, two hundred thirty-one thousand, eleven".