211121010010 has 16 divisors (see below), whose sum is σ = 380083296456. Its totient is φ = 84433853248.

The previous prime is 211121009989. The next prime is 211121010011. The reversal of 211121010010 is 10010121112.

It can be written as a sum of positive squares in 4 ways, for example, as 113797600921 + 97323409089 = 337339^2 + 311967^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (211121010011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1757809 + ... + 1874068.

Almost surely, 2^211121010010 is an apocalyptic number.

211121010010 is a deficient number, since it is larger than the sum of its proper divisors (168962286446).

211121010010 is a wasteful number, since it uses less digits than its factorization.

211121010010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637697.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 211121010010 its reverse (10010121112), we get a palindrome (221131131122).

The spelling of 211121010010 in words is "two hundred eleven billion, one hundred twenty-one million, ten thousand, ten".