211001221010 has 64 divisors (see below), whose sum is σ = 409901023584. Its totient is φ = 77910835200.

The previous prime is 211001221003. The next prime is 211001221019. The reversal of 211001221010 is 10122100112.

211001221010 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 16 ways, for example, as 9729652321 + 201271568689 = 98639^2 + 448633^2 .

It is a junction number, because it is equal to n+sod(n) for n = 211001220982 and 211001221000.

It is not an unprimeable number, because it can be changed into a prime (211001221019) 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 31 ways as a sum of consecutive naturals, for example, 3631790 + ... + 3689430.

Almost surely, 2^211001221010 is an apocalyptic number.

211001221010 is a deficient number, since it is larger than the sum of its proper divisors (198899802574).

211001221010 is a wasteful number, since it uses less digits than its factorization.

211001221010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58079.

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

Adding to 211001221010 its reverse (10122100112), we get a palindrome (221123321122).

The spelling of 211001221010 in words is "two hundred eleven billion, one million, two hundred twenty-one thousand, ten".