2101210011 has 32 divisors (see below), whose sum is σ = 3303360000. Its totient is φ = 1317168864.

The previous prime is 2101210009. The next prime is 2101210031. The reversal of 2101210011 is 1100121012.

It is a happy number.

It is not a de Polignac number, because 2101210011 - 2¹ = 2101210009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2101209975 and 2101210002.

It is not an unprimeable number, because it can be changed into a prime (2101210031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7965 + ... + 65313.

It is an arithmetic number, because the mean of its divisors is an integer number (103230000).

Almost surely, 2^2101210011 is an apocalyptic number.

2101210011 is a deficient number, since it is larger than the sum of its proper divisors (1202149989).

2101210011 is a wasteful number, since it uses less digits than its factorization.

2101210011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57440 (or 57434 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 2101210011 is about 45838.9573507077. The cubic root of 2101210011 is about 1280.8250725055.

Adding to 2101210011 its reverse (1100121012), we get a palindrome (3201331023).

The spelling of 2101210011 in words is "two billion, one hundred one million, two hundred ten thousand, eleven".